US6609213B1 - Cluster-based system and method of recovery from server failures - Google Patents

Cluster-based system and method of recovery from server failures Download PDF

Info

Publication number
US6609213B1
US6609213B1 US09/637,093 US63709300A US6609213B1 US 6609213 B1 US6609213 B1 US 6609213B1 US 63709300 A US63709300 A US 63709300A US 6609213 B1 US6609213 B1 US 6609213B1
Authority
US
United States
Prior art keywords
server
cluster
failing
clustered
lun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime, expires
Application number
US09/637,093
Inventor
Nam Nguyen
Michael Kosacek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dell Products LP
Original Assignee
Dell Products LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US09/637,093 priority Critical patent/US6609213B1/en
Assigned to DELL PRODUCTS, LP reassignment DELL PRODUCTS, LP ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOSACEK, MICHAEL, NGUYEN, NAM
Application filed by Dell Products LP filed Critical Dell Products LP
Application granted granted Critical
Publication of US6609213B1 publication Critical patent/US6609213B1/en
Assigned to BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS FIRST LIEN COLLATERAL AGENT reassignment BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS FIRST LIEN COLLATERAL AGENT PATENT SECURITY AGREEMENT (NOTES) Assignors: APPASSURE SOFTWARE, INC., ASAP SOFTWARE EXPRESS, INC., BOOMI, INC., COMPELLENT TECHNOLOGIES, INC., CREDANT TECHNOLOGIES, INC., DELL INC., DELL MARKETING L.P., DELL PRODUCTS L.P., DELL SOFTWARE INC., DELL USA L.P., FORCE10 NETWORKS, INC., GALE TECHNOLOGIES, INC., PEROT SYSTEMS CORPORATION, SECUREWORKS, INC., WYSE TECHNOLOGY L.L.C.
Assigned to BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT reassignment BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT PATENT SECURITY AGREEMENT (ABL) Assignors: APPASSURE SOFTWARE, INC., ASAP SOFTWARE EXPRESS, INC., BOOMI, INC., COMPELLENT TECHNOLOGIES, INC., CREDANT TECHNOLOGIES, INC., DELL INC., DELL MARKETING L.P., DELL PRODUCTS L.P., DELL SOFTWARE INC., DELL USA L.P., FORCE10 NETWORKS, INC., GALE TECHNOLOGIES, INC., PEROT SYSTEMS CORPORATION, SECUREWORKS, INC., WYSE TECHNOLOGY L.L.C.
Assigned to BANK OF AMERICA, N.A., AS COLLATERAL AGENT reassignment BANK OF AMERICA, N.A., AS COLLATERAL AGENT PATENT SECURITY AGREEMENT (TERM LOAN) Assignors: APPASSURE SOFTWARE, INC., ASAP SOFTWARE EXPRESS, INC., BOOMI, INC., COMPELLENT TECHNOLOGIES, INC., CREDANT TECHNOLOGIES, INC., DELL INC., DELL MARKETING L.P., DELL PRODUCTS L.P., DELL SOFTWARE INC., DELL USA L.P., FORCE10 NETWORKS, INC., GALE TECHNOLOGIES, INC., PEROT SYSTEMS CORPORATION, SECUREWORKS, INC., WYSE TECHNOLOGY L.L.C.
Assigned to COMPELLANT TECHNOLOGIES, INC., DELL MARKETING L.P., FORCE10 NETWORKS, INC., DELL PRODUCTS L.P., WYSE TECHNOLOGY L.L.C., ASAP SOFTWARE EXPRESS, INC., DELL SOFTWARE INC., DELL INC., CREDANT TECHNOLOGIES, INC., APPASSURE SOFTWARE, INC., SECUREWORKS, INC., DELL USA L.P., PEROT SYSTEMS CORPORATION reassignment COMPELLANT TECHNOLOGIES, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Assigned to DELL PRODUCTS L.P., DELL MARKETING L.P., FORCE10 NETWORKS, INC., DELL INC., COMPELLENT TECHNOLOGIES, INC., PEROT SYSTEMS CORPORATION, DELL USA L.P., DELL SOFTWARE INC., APPASSURE SOFTWARE, INC., WYSE TECHNOLOGY L.L.C., ASAP SOFTWARE EXPRESS, INC., CREDANT TECHNOLOGIES, INC., SECUREWORKS, INC. reassignment DELL PRODUCTS L.P. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT
Assigned to FORCE10 NETWORKS, INC., PEROT SYSTEMS CORPORATION, ASAP SOFTWARE EXPRESS, INC., DELL MARKETING L.P., WYSE TECHNOLOGY L.L.C., DELL INC., COMPELLENT TECHNOLOGIES, INC., CREDANT TECHNOLOGIES, INC., DELL PRODUCTS L.P., DELL SOFTWARE INC., APPASSURE SOFTWARE, INC., DELL USA L.P., SECUREWORKS, INC. reassignment FORCE10 NETWORKS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Assigned to CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT reassignment CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: ASAP SOFTWARE EXPRESS, INC., AVENTAIL LLC, CREDANT TECHNOLOGIES, INC., DELL INTERNATIONAL L.L.C., DELL MARKETING L.P., DELL PRODUCTS L.P., DELL SOFTWARE INC., DELL SYSTEMS CORPORATION, DELL USA L.P., EMC CORPORATION, EMC IP Holding Company LLC, FORCE10 NETWORKS, INC., MAGINATICS LLC, MOZY, INC., SCALEIO LLC, SPANNING CLOUD APPS LLC, WYSE TECHNOLOGY L.L.C.
Assigned to THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT reassignment THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT SECURITY AGREEMENT Assignors: ASAP SOFTWARE EXPRESS, INC., AVENTAIL LLC, CREDANT TECHNOLOGIES, INC., DELL INTERNATIONAL L.L.C., DELL MARKETING L.P., DELL PRODUCTS L.P., DELL SOFTWARE INC., DELL SYSTEMS CORPORATION, DELL USA L.P., EMC CORPORATION, EMC IP Holding Company LLC, FORCE10 NETWORKS, INC., MAGINATICS LLC, MOZY, INC., SCALEIO LLC, SPANNING CLOUD APPS LLC, WYSE TECHNOLOGY L.L.C.
Assigned to THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. reassignment THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. SECURITY AGREEMENT Assignors: CREDANT TECHNOLOGIES, INC., DELL INTERNATIONAL L.L.C., DELL MARKETING L.P., DELL PRODUCTS L.P., DELL USA L.P., EMC CORPORATION, EMC IP Holding Company LLC, FORCE10 NETWORKS, INC., WYSE TECHNOLOGY L.L.C.
Assigned to THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. reassignment THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. SECURITY AGREEMENT Assignors: CREDANT TECHNOLOGIES INC., DELL INTERNATIONAL L.L.C., DELL MARKETING L.P., DELL PRODUCTS L.P., DELL USA L.P., EMC CORPORATION, EMC IP Holding Company LLC, FORCE10 NETWORKS, INC., WYSE TECHNOLOGY L.L.C.
Assigned to DELL SYSTEMS CORPORATION, SCALEIO LLC, MOZY, INC., DELL MARKETING L.P., FORCE10 NETWORKS, INC., DELL SOFTWARE INC., DELL USA L.P., WYSE TECHNOLOGY L.L.C., DELL INTERNATIONAL, L.L.C., DELL PRODUCTS L.P., AVENTAIL LLC, ASAP SOFTWARE EXPRESS, INC., EMC CORPORATION, EMC IP Holding Company LLC, MAGINATICS LLC, CREDANT TECHNOLOGIES, INC. reassignment DELL SYSTEMS CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
Adjusted expiration legal-status Critical
Assigned to DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.), DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.), DELL PRODUCTS L.P., EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.), SCALEIO LLC, DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.), DELL USA L.P., EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC), DELL INTERNATIONAL L.L.C. reassignment DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.) RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001) Assignors: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
Assigned to DELL USA L.P., DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.), DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.), DELL INTERNATIONAL L.L.C., DELL PRODUCTS L.P., SCALEIO LLC, EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.), DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.), EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC) reassignment DELL USA L.P. RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001) Assignors: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
    • G06F11/2023—Failover techniques
    • G06F11/2025—Failover techniques using centralised failover control functionality
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
    • G06F11/2023—Failover techniques
    • G06F11/2028—Failover techniques eliminating a faulty processor or activating a spare
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
    • G06F11/2023—Failover techniques
    • G06F11/2033—Failover techniques switching over of hardware resources
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
    • G06F11/2038—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant with a single idle spare processing component

Definitions

  • the present disclosure relates in general to the field of computer networks, and, more particularly, to a system and method for providing backup server service in a multi-computer environment.
  • a cluster is a parallel or distributed system that comprises a collection of interconnected computer systems or servers that is used as a single, unified computing unit. Members of a cluster are referred to as nodes or systems.
  • the cluster service is the collection of software on each node that manages cluster-related activity.
  • the cluster service sees all resources as identical objects. Resource may include physical hardware devices, such as disk drives and network cards, or logical items, such as logical disk volumes, TCP/IP addresses, entire applications and databases, among other examples.
  • a group is a collection of resources to be managed as a single unit. Generally, a group contains all of the components that are necessary for running a specific application and allowing a user to connect to the service provided by the application. Operations performed on a group typically affect all resources contained within that group. By coupling two or more servers together, clustering increases the system availability, performance, and capacity for network systems and applications.
  • Clustering may be used for parallel processing or parallel computing to simultaneously use two or more CPUs to execute an application or program.
  • Clustering is a popular strategy for implementing parallel processing applications because it allows system administrators to leverage already existing computers and workstations. Because it is difficult to predict the number of requests that will be issued to a networked server, clustering is also useful for load balancing to distribute processing and communications activity evenly across a network system so that no single server is overwhelmed. If one server is running the risk of being swamped, requests may be forwarded to another clustered server with greater capacity. For example, busy Web sites may employ two or more clustered Web servers in order to employ a load balancing scheme. Clustering also provides for increased scalability by allowing new components to be added as the system load increases.
  • clustering simplifies the management of groups of systems and their applications by allowing the system administrator to manage an entire group as a single system.
  • Clustering may also be used to increase the fault tolerance of a network system. If one server suffers an unexpected software or hardware failure, another clustered server may assume the operations of the failed server. Thus, if any hardware of software component in the system fails, the user might experience a performance penalty, but will not lose access to the service.
  • MSCS Microsoft Cluster Server
  • NWCS Novell Netware Cluster Services
  • MSCS currently supports the clustering of two NT servers to provide a single highly available server.
  • Windows NT clusters are “shared nothing” clusters. While several systems in the cluster may have access to a given device or resource, it is effectively owned and managed by a single system at a time. Services in a Windows NT cluster are presented to the user as virtual servers. From the user's standpoint, the user is connecting to an actual physical system. In fact, the user is connecting to a service which may be provided by one of several systems. Users create TCP/IP session with a service in the cluster using a known IP address. This address appears to the cluster software as a resource in the same group as the application providing the service.
  • clustered servers may use a heartbeat mechanism to monitor the health of each other.
  • a heartbeat is a periodic signal that is sent by one clustered server to another clustered server.
  • a heartbeat link is typically maintained over a fast Ethernet connection, private LAN or similar network.
  • a system failure is detected when a clustered server is unable to respond to a heartbeat sent by another server.
  • the cluster service will transfer the entire resource group to another system.
  • the client application will detect a failure in the session and reconnect in the same manner as the original connection. The IP address is now available on another machine and the connection will be re-established. For example, if two clustered servers that share external storage are connected by a heartbeat link and one of the servers fails, then the other server will assume the failed server's storage, resume network services, take IP addresses, and restart any registered applications.
  • Clustering may also be implemented in computer networks utilizing storage area networks (SAN) and similar networking environments.
  • SAN networks allow storage systems to be shared among multiple clusters and/or servers.
  • the storage devices in a SAN may be structured in a RAID configuration.
  • each storage device When a system administrator configures a shared data storage pool into a SAN, each storage device may be grouped together into one or more RAID volumes and each volume is assigned a SCSI logical unit number (LUN) address. If the storage devices are not grouped into RAID volumes, each storage device will typically be assigned its own target ID or LUN.
  • the system administrator or the operating system for the network will assign a volume or storage device and its corresponding LUN to each server of the computer network.
  • Each server will then have, from a memory management standpoint, logical ownership of a particular LUN and will store the data generated from that server in the volume or storage device corresponding to the LUN owned by the server.
  • conventional storage consolidation software manages the LUNs to ensure that each storage device is assigned to a particular server in a manner that does not risk an access conflict.
  • storage consolidation software may utilize LUN masking software to ensure that each server sees only a limited number of available devices on the network.
  • a server fails, it is desirable to recover from the failure in a fast and economical manner that does not disrupt the other servers connected in the SAN.
  • One method involves designating a spare or hot standby server. Several manual steps are required for integrating the spare server into the SAN network in the event of a failure. For example, the IP address and NetBIOS network name of the spare server must generally be reconfigured to match that of the failing server. The spare server is then connected to the SAN and brought online. Next, the storage consolidation software associated with the SAN must be reconfigured to allow the spare server access to the data on the SAN's storage devices. In addition to requiring manual intervention, the use of a spare server also requires an additional server that is not being utilized for useful work.
  • this method provides only a fair recovery time and cost of an additional server is somewhat prohibitive.
  • Another approach is to troubleshoot and fix the failure in the field. The recovery time varies depending on the failure and may take a long time. For example, if the boot disk fails, the disk must be replaced and the OS needs to be reinstalled. If there is a hardware failure, the server needs to be offline until the troubleshooting is completed and the faulty component is replaced.
  • Another method for providing a fast recovery time from a server failure is to implement MSCS cluster software. Unfortunately, while this method provides an excellent recovery time, this method requires installing Windows NT 4.0 Enterprise Edition or Windows 2000 Advanced Server on every node. Because this software is costly and because conventional networks tend to utilize a large number of nodes, this solution is very expensive.
  • a system and method for providing backup server service in a multi-computer environment are disclosed that provide significant advantages over prior developed systems.
  • the present invention utilizes a cluster in a SAN storage consolidation group consisting of several stand-alone, non-clustered, servers, wherein the cluster also serves as the spare server.
  • This cluster will have one standby recovery group for each non-clustered server.
  • Each recovery group contains the IP address and network name of the associated stand-alone server.
  • the recovery groups are preferably in the offline mode during normal operation.
  • the cluster monitors the health of the stand-alone servers, preferably through the use of a heartbeat mechanism. If the cluster detects a failure, it will use the storage consolidation software associated with the SAN to reassign the LUNs owned by the failing server to the cluster. After the cluster has reassigned the LUNs, it will activate the recovery group containing the IP address and network name of the failing server. This will enable the cluster to assume the identity of the failing server and serve its users.
  • a technical advantage of the present invention is that Windows NT Enterprise Edition, Windows 2000 Advanced Server, or other expensive cluster software packages need not be installed on every server. As computer networks continue to expand and include more and more servers, the expense of installing cluster software on every server becomes a serious cost issue. As a result, significant cost savings can be realized from the present invention because cluster software need only be installed on one server, regardless of the size of the computer network.
  • the cluster is able to perform useful work and serve clients while also acting as a spare server for the stand-alone servers in the SAN storage consolidation group.
  • the cluster is an active component in the computer network.
  • the system administrator can maximize the investment made in the cluster because the cluster can perform several roles.
  • the recovery time only consists of the time required to detect the error, reassign the LUNs and activate the cluster resource group, the recovery time is excellent.
  • the use of a cluster resource group is a much faster solution than integrating a hot or spare cluster into the computer network or troubleshooting the problem.
  • a heartbeat mechanism may be implemented in a network that contains more nodes than a conventional cluster. The present invention allows for the heartbeat mechanism to be coupled to all the servers on the computer network.
  • FIG. 1 is a diagram of a computer network
  • FIG. 2 is a process flow diagram of one embodiment of the present invention.
  • FIG. 3 is another diagram of a computer network.
  • FIG. 1 is a diagram of a computer network.
  • a storage consolidation network indicated generally at 10 , includes a server network 12 of a plurality of servers 14 .
  • Servers 14 can include WINDOWS NT-based servers.
  • Server network 12 can include, for example, a local area network (LAN), a wide area network, or other computer network allowing transmission of data between computing devices.
  • Servers 14 may employ a variety of network protocols for the transfer of data, including TCP/IP.
  • the number of servers may vary from the number shown in FIG. 1 and described in this disclosure.
  • Server network 12 also comprises cluster group 16 .
  • Cluster group 16 comprises one or more cluster servers 18 .
  • Cluster software is installed on cluster server 18 .
  • An example of suitable cluster software includes MSCS.
  • the number of cluster servers 18 may vary from the number shown in FIG. 1 and described in this disclosure.
  • cluster servers 18 may be arranged in a two-node cluster. In this arrangement, two cluster servers 18 are connected by a heartbeat mechanism. In the event one cluster server fails, the second cluster server can assume the identity of the other.
  • Cluster servers 18 may include more than one or two nodes.
  • Cluster server 18 is communicatively coupled to servers 14 by cluster interconnect 20 .
  • Cluster interconnect 20 may be any device suitable for creating a communication interface between the interconnected nodes in a server cluster network. Examples of cluster interconnect 20 include components implementing a Fast Ethernet connection or a virtual interface (VI) architecture or similar standard.
  • VIP virtual interface
  • Storage consolidation network 10 further includes storage area network (SAN) 26 coupled to server network 12 via Fibre Channel fabric or switching fabric 22 .
  • the Fibre Channel fabric 22 is composed of several Fibre Channel switches 24 that allow various electronic interconnections between the various devices that compose storage consolidation network 10 .
  • SAN 26 includes a storage controller 32 that is coupled to a plurality of physical storage devices 28 , collectively known as a storage pool, via bridges 30 .
  • Storage devices 28 may be any devices suitable for storing data, such as a collection of hard disk drives or other integrated non-volatile memory.
  • Bridge 30 is a communications device that allows a networked device, such as storage device 28 , to communicate electronically with devices employing Fibre Channel protocol.
  • Bridge 30 may be a small computer interface (SCSI) bridge, a SCSI/FC bridge or a FC bridge. Bridge 30 may be incorporated into another device, such as Fibre Channel switches 24 , or may be a separate component.
  • Storage controller 32 is a device suitable for coordinating access to storage devices 28 .
  • Storage controller 32 is preferably a RAID (Redundant Array of Independent Disks) controller whereby storage devices 28 can be grouped into RAID volumes and each volume assigned a SCSI logical unit number (LUN) address.
  • SAN 26 can use SCSI addressing methods to store and retrieve data from storage devices 28 .
  • SAN 26 can include fewer or more storage devices 28 than depicted in FIG. 1 .
  • Servers 14 within computer network 14 can transfer data between other servers 14 as well as to and from SAN 26 .
  • SAN 26 provides a large amount of storage space and can be operated as the consolidated storage for computer network 12 .
  • Storage consolidation network 10 may further include dedicated backup storage devices, printers, and other components suitable for coupling to a computer network.
  • FIG. 2 is a process flow diagram of one embodiment of the present invention.
  • cluster server 18 monitors the status of server 14 by sending out heartbeat signals at regular intervals to servers 14 through cluster interconnect 20 .
  • this heartbeat mechanism may be implemented by the storage consolidation software, or any other suitable software or instrumentality.
  • the heartbeat signals are communicated over a dedicated line rather than the same network connection used by general network traffic.
  • a line dedicated to heartbeat signals would free up network resources and increase the responsiveness of the heartbeat mechanism.
  • the heartbeat mechanism involves transmitting a packet, or heartbeat signal, to a server 14 on the network and waiting for a response from server 14 .
  • the heartbeat mechanism is operable to request a response to the heartbeat signal from server 14 . If server 14 is alive, or functioning properly, it will respond to the heartbeat signal in a timely manner. If server 14 does not respond within a specified period of time, then this inability to respond indicates that server 14 is failing and will be unable to serve its associated users.
  • cluster server 18 if cluster server 18 receives a timely response from servers 14 to a given heartbeat signal, it will continue monitoring the status of servers 14 as shown at step 34 . However, if cluster server 18 does not receive a response from a server 14 within a specified period of time, then cluster server 18 will initiate a failover procedure.
  • the storage consolidation software associated with the SAN reassigns the LUNs owned by the failing server 14 to cluster server 18 . For example, if server 14 a is detected as failing and it has ownership of the LUN associated with storage device 28 a , then the cluster server 18 will receive ownership of that LUN and sole access to storage device 28 a .
  • conventional storage consolidation software is operable to assign and mask LUNs.
  • cluster server 18 will be able to access the storage devices 28 , or other components, associated with the re-assigned LUNs. Therefore, no access conflicts will arise between cluster server 18 and any other server 14 over the devices associated with the reassigned LUNs.
  • FIG. 3 is another version of the network of FIG. 1 and depicts servers 14 and the associated virtual servers 44 .
  • cluster software is operable to present services to the users of clustered servers through virtual servers. Instead of providing several separate servers, several virtual servers can co-reside on a single computer system. Thus, each virtual server shares the same computer resources with the other virtual servers residing on the computer system. Virtual servers are indistinguishable from real servers from a user standpoint because virtual servers possess an IP address, a network name and other indicia of a real server.
  • Several virtual servers 44 may reside on cluster server 18 .
  • the clustering software may be used to create a group of virtual servers 44 that reside on cluster server 18 and serve as a standby resource groups, or recovery groups.
  • Each server 14 on storage consolidation network 10 has an associated recovery group 44 .
  • Each recovery group 44 possesses the same network name and IP address as its associated server 14 .
  • recovery groups 44 a , 44 b , 44 c and 44 d are associated with servers 14 a , 14 b , 14 c , and 14 d respectively.
  • the network name for server 14 a is “server 1 ” and its IP address is “1.142.122.20”
  • the network name and IP address for recovery group 44 a will also be “server 1 ” and “1.142.122.20.”
  • the recovery groups are preferably offline, or inactive, during normal operation.
  • cluster server 18 activates the recovery group containing the IP address and network name of the failing server 14 . For example, if server 14 a failed to respond to the heartbeat signal at step 36 , then recovery group 44 a will be brought online.
  • the cluster assumes the identity of the failing server via the recovery group associated with the failing server. The cluster now has ownership of the failing server's LUNs and will receive all user requests directed to the failing server. Thus, all of the applications associated with the failing server have migrated to the cluster server 18 through the recovery group. For example, if the failing server was running a file share application, then cluster server 18 will now manage this file server application through the recovery group. Accordingly, the cluster is operable to serve the users of the failing server.
  • a multiple-node cluster wherein the cluster servers 18 monitor each other through a heartbeat mechanism, will generally offer greater reliability than a single member cluster 16 .
  • the other cluster servers 18 can assume that server's identity and applications through a recovery group 44 associated with that failing cluster server 18 .
  • additional expense may be avoided by implementing a single node cluster 16 .
  • the system administrator may manually initiate the recovery process. For example, if the heartbeat mechanism does not detect a failure, then the cluster server 18 will not take over the LUNs of the failing server 14 a and its users will accordingly lose service. Therefore, if the system administrator observes an event that indicates a possible server failure that has not been detected by the heartbeat mechanism, such as an application that has unexpectedly crashed, for example, then the system administrator will need to intervene. In this case, the system administrator may manually reassign the LUNs owned by the failing server 14 a , bring the associated recovery group 44 a online, and take the failing server 14 a offline for troubleshooting and repair.
  • the system administrator may arrange for the repair of server 14 a without disrupting the other servers 14 on storage consolidation network 10 .
  • users may be migrated back to the repaired server 14 a from the cluster server 18 .
  • the system administrator offlines or deactivates the recovery group 44 a associated with the repaired server 14 a , integrates the repaired server 14 a back into the storage consolidation network 10 , and re-assigns the LUNs back to the repaired server 14 a . Preferably this occurs at night, or when users do not have access to the servers 14 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Hardware Redundancy (AREA)

Abstract

A system and method for recovering from a server failure in a computer network, wherein the network contains several stand-alone, non-clustered, servers, and a cluster, wherein a clustered server also serves as the spare server, is disclosed. This cluster will have one standby recovery group for each non-clustered server in the computer network. Each recovery group contains the IP address and network name of the associated stand-alone server. The cluster monitors the health of the stand-alone servers, preferably through the use of a heartbeat mechanism. If the cluster detects a failure, it will reassign the LUNs owned by the failing server to the cluster. After the cluster has reassigned the LUNs, it will activate the recovery group containing the IP address and network name of the failing server. Subsequently, the cluster will assume the identity of the failing server and serve its users, until the failing server is repaired or replaced.

Description

TECHNICAL FIELD
The present disclosure relates in general to the field of computer networks, and, more particularly, to a system and method for providing backup server service in a multi-computer environment.
BACKGROUND
A cluster is a parallel or distributed system that comprises a collection of interconnected computer systems or servers that is used as a single, unified computing unit. Members of a cluster are referred to as nodes or systems. The cluster service is the collection of software on each node that manages cluster-related activity. The cluster service sees all resources as identical objects. Resource may include physical hardware devices, such as disk drives and network cards, or logical items, such as logical disk volumes, TCP/IP addresses, entire applications and databases, among other examples. A group is a collection of resources to be managed as a single unit. Generally, a group contains all of the components that are necessary for running a specific application and allowing a user to connect to the service provided by the application. Operations performed on a group typically affect all resources contained within that group. By coupling two or more servers together, clustering increases the system availability, performance, and capacity for network systems and applications.
Clustering may be used for parallel processing or parallel computing to simultaneously use two or more CPUs to execute an application or program. Clustering is a popular strategy for implementing parallel processing applications because it allows system administrators to leverage already existing computers and workstations. Because it is difficult to predict the number of requests that will be issued to a networked server, clustering is also useful for load balancing to distribute processing and communications activity evenly across a network system so that no single server is overwhelmed. If one server is running the risk of being swamped, requests may be forwarded to another clustered server with greater capacity. For example, busy Web sites may employ two or more clustered Web servers in order to employ a load balancing scheme. Clustering also provides for increased scalability by allowing new components to be added as the system load increases. In addition, clustering simplifies the management of groups of systems and their applications by allowing the system administrator to manage an entire group as a single system. Clustering may also be used to increase the fault tolerance of a network system. If one server suffers an unexpected software or hardware failure, another clustered server may assume the operations of the failed server. Thus, if any hardware of software component in the system fails, the user might experience a performance penalty, but will not lose access to the service.
Current cluster services include Microsoft Cluster Server (MSCS), designed by Microsoft Corporation for clustering for its Windows NT 4.0 and Windows 2000 Advanced Server operating systems, and Novell Netware Cluster Services (NWCS), among other examples. For instance, MSCS currently supports the clustering of two NT servers to provide a single highly available server. Generally, Windows NT clusters are “shared nothing” clusters. While several systems in the cluster may have access to a given device or resource, it is effectively owned and managed by a single system at a time. Services in a Windows NT cluster are presented to the user as virtual servers. From the user's standpoint, the user is connecting to an actual physical system. In fact, the user is connecting to a service which may be provided by one of several systems. Users create TCP/IP session with a service in the cluster using a known IP address. This address appears to the cluster software as a resource in the same group as the application providing the service.
In order to detect system failures, clustered servers may use a heartbeat mechanism to monitor the health of each other. A heartbeat is a periodic signal that is sent by one clustered server to another clustered server. A heartbeat link is typically maintained over a fast Ethernet connection, private LAN or similar network. A system failure is detected when a clustered server is unable to respond to a heartbeat sent by another server. In the event of failure, the cluster service will transfer the entire resource group to another system. Typically, the client application will detect a failure in the session and reconnect in the same manner as the original connection. The IP address is now available on another machine and the connection will be re-established. For example, if two clustered servers that share external storage are connected by a heartbeat link and one of the servers fails, then the other server will assume the failed server's storage, resume network services, take IP addresses, and restart any registered applications.
Clustering may also be implemented in computer networks utilizing storage area networks (SAN) and similar networking environments. SAN networks allow storage systems to be shared among multiple clusters and/or servers. The storage devices in a SAN may be structured in a RAID configuration. When a system administrator configures a shared data storage pool into a SAN, each storage device may be grouped together into one or more RAID volumes and each volume is assigned a SCSI logical unit number (LUN) address. If the storage devices are not grouped into RAID volumes, each storage device will typically be assigned its own target ID or LUN. The system administrator or the operating system for the network will assign a volume or storage device and its corresponding LUN to each server of the computer network. Each server will then have, from a memory management standpoint, logical ownership of a particular LUN and will store the data generated from that server in the volume or storage device corresponding to the LUN owned by the server. In order to avoid the problem of data corruption that results from access conflicts, conventional storage consolidation software manages the LUNs to ensure that each storage device is assigned to a particular server in a manner that does not risk an access conflict. For example, storage consolidation software may utilize LUN masking software to ensure that each server sees only a limited number of available devices on the network.
If a server fails, it is desirable to recover from the failure in a fast and economical manner that does not disrupt the other servers connected in the SAN. One method involves designating a spare or hot standby server. Several manual steps are required for integrating the spare server into the SAN network in the event of a failure. For example, the IP address and NetBIOS network name of the spare server must generally be reconfigured to match that of the failing server. The spare server is then connected to the SAN and brought online. Next, the storage consolidation software associated with the SAN must be reconfigured to allow the spare server access to the data on the SAN's storage devices. In addition to requiring manual intervention, the use of a spare server also requires an additional server that is not being utilized for useful work. In addition, this method provides only a fair recovery time and cost of an additional server is somewhat prohibitive. Another approach is to troubleshoot and fix the failure in the field. The recovery time varies depending on the failure and may take a long time. For example, if the boot disk fails, the disk must be replaced and the OS needs to be reinstalled. If there is a hardware failure, the server needs to be offline until the troubleshooting is completed and the faulty component is replaced. As discussed above, another method for providing a fast recovery time from a server failure is to implement MSCS cluster software. Unfortunately, while this method provides an excellent recovery time, this method requires installing Windows NT 4.0 Enterprise Edition or Windows 2000 Advanced Server on every node. Because this software is costly and because conventional networks tend to utilize a large number of nodes, this solution is very expensive.
SUMMARY
In accordance with teachings of the present disclosure, a system and method for providing backup server service in a multi-computer environment are disclosed that provide significant advantages over prior developed systems.
The present invention utilizes a cluster in a SAN storage consolidation group consisting of several stand-alone, non-clustered, servers, wherein the cluster also serves as the spare server. This cluster will have one standby recovery group for each non-clustered server. Each recovery group contains the IP address and network name of the associated stand-alone server. The recovery groups are preferably in the offline mode during normal operation. The cluster monitors the health of the stand-alone servers, preferably through the use of a heartbeat mechanism. If the cluster detects a failure, it will use the storage consolidation software associated with the SAN to reassign the LUNs owned by the failing server to the cluster. After the cluster has reassigned the LUNs, it will activate the recovery group containing the IP address and network name of the failing server. This will enable the cluster to assume the identity of the failing server and serve its users.
A technical advantage of the present invention is that Windows NT Enterprise Edition, Windows 2000 Advanced Server, or other expensive cluster software packages need not be installed on every server. As computer networks continue to expand and include more and more servers, the expense of installing cluster software on every server becomes a serious cost issue. As a result, significant cost savings can be realized from the present invention because cluster software need only be installed on one server, regardless of the size of the computer network.
Another advantage of the present invention is that the cluster is able to perform useful work and serve clients while also acting as a spare server for the stand-alone servers in the SAN storage consolidation group. Thus, unlike a hot or spare back-up server, the cluster is an active component in the computer network. As a result, the system administrator can maximize the investment made in the cluster because the cluster can perform several roles. Furthermore, because the recovery time only consists of the time required to detect the error, reassign the LUNs and activate the cluster resource group, the recovery time is excellent. The use of a cluster resource group is a much faster solution than integrating a hot or spare cluster into the computer network or troubleshooting the problem. In addition, a heartbeat mechanism may be implemented in a network that contains more nodes than a conventional cluster. The present invention allows for the heartbeat mechanism to be coupled to all the servers on the computer network. Other technical advantages should be apparent to one of ordinary skill in the art in view of the specification, claims, and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
A more complete understanding of the present embodiments and advantages thereof may be acquired by referring to the following description taken in conjunction with the accompanying drawings, in which like reference numbers indicate like features, and wherein:
FIG. 1 is a diagram of a computer network;
FIG. 2 is a process flow diagram of one embodiment of the present invention; and
FIG. 3 is another diagram of a computer network.
DETAILED DESCRIPTION
FIG. 1 is a diagram of a computer network. A storage consolidation network, indicated generally at 10, includes a server network 12 of a plurality of servers 14. Servers 14 can include WINDOWS NT-based servers. Server network 12 can include, for example, a local area network (LAN), a wide area network, or other computer network allowing transmission of data between computing devices. Servers 14 may employ a variety of network protocols for the transfer of data, including TCP/IP. The number of servers may vary from the number shown in FIG. 1 and described in this disclosure.
Server network 12 also comprises cluster group 16. Cluster group 16 comprises one or more cluster servers 18. Cluster software is installed on cluster server 18. An example of suitable cluster software includes MSCS. The number of cluster servers 18 may vary from the number shown in FIG. 1 and described in this disclosure. For example, cluster servers 18 may be arranged in a two-node cluster. In this arrangement, two cluster servers 18 are connected by a heartbeat mechanism. In the event one cluster server fails, the second cluster server can assume the identity of the other. Cluster servers 18 may include more than one or two nodes. Cluster server 18 is communicatively coupled to servers 14 by cluster interconnect 20. Cluster interconnect 20 may be any device suitable for creating a communication interface between the interconnected nodes in a server cluster network. Examples of cluster interconnect 20 include components implementing a Fast Ethernet connection or a virtual interface (VI) architecture or similar standard.
Storage consolidation network 10 further includes storage area network (SAN) 26 coupled to server network 12 via Fibre Channel fabric or switching fabric 22. The Fibre Channel fabric 22 is composed of several Fibre Channel switches 24 that allow various electronic interconnections between the various devices that compose storage consolidation network 10. SAN 26 includes a storage controller 32 that is coupled to a plurality of physical storage devices 28, collectively known as a storage pool, via bridges 30. Storage devices 28 may be any devices suitable for storing data, such as a collection of hard disk drives or other integrated non-volatile memory. Bridge 30 is a communications device that allows a networked device, such as storage device 28, to communicate electronically with devices employing Fibre Channel protocol. For example, Bridge 30 may be a small computer interface (SCSI) bridge, a SCSI/FC bridge or a FC bridge. Bridge 30 may be incorporated into another device, such as Fibre Channel switches 24, or may be a separate component. Storage controller 32 is a device suitable for coordinating access to storage devices 28. Storage controller 32 is preferably a RAID (Redundant Array of Independent Disks) controller whereby storage devices 28 can be grouped into RAID volumes and each volume assigned a SCSI logical unit number (LUN) address. In this configuration, SAN 26 can use SCSI addressing methods to store and retrieve data from storage devices 28. SAN 26 can include fewer or more storage devices 28 than depicted in FIG. 1. Servers 14 within computer network 14 can transfer data between other servers 14 as well as to and from SAN 26. SAN 26 provides a large amount of storage space and can be operated as the consolidated storage for computer network 12. Storage consolidation network 10 may further include dedicated backup storage devices, printers, and other components suitable for coupling to a computer network.
FIG. 2 is a process flow diagram of one embodiment of the present invention. At step 34, cluster server 18 monitors the status of server 14 by sending out heartbeat signals at regular intervals to servers 14 through cluster interconnect 20. Alternatively, this heartbeat mechanism may be implemented by the storage consolidation software, or any other suitable software or instrumentality. Preferably, the heartbeat signals are communicated over a dedicated line rather than the same network connection used by general network traffic. A line dedicated to heartbeat signals would free up network resources and increase the responsiveness of the heartbeat mechanism. As discussed above, the heartbeat mechanism involves transmitting a packet, or heartbeat signal, to a server 14 on the network and waiting for a response from server 14. The heartbeat mechanism is operable to request a response to the heartbeat signal from server 14. If server 14 is alive, or functioning properly, it will respond to the heartbeat signal in a timely manner. If server 14 does not respond within a specified period of time, then this inability to respond indicates that server 14 is failing and will be unable to serve its associated users.
Accordingly, at step 36, if cluster server 18 receives a timely response from servers 14 to a given heartbeat signal, it will continue monitoring the status of servers 14 as shown at step 34. However, if cluster server 18 does not receive a response from a server 14 within a specified period of time, then cluster server 18 will initiate a failover procedure. At step 38, the storage consolidation software associated with the SAN reassigns the LUNs owned by the failing server 14 to cluster server 18. For example, if server 14 a is detected as failing and it has ownership of the LUN associated with storage device 28 a, then the cluster server 18 will receive ownership of that LUN and sole access to storage device 28 a. As discussed above, conventional storage consolidation software is operable to assign and mask LUNs. Preferably, once the LUNs owned by the failing server 14 have been re-assigned to cluster server 18, only cluster server 18 will be able to access the storage devices 28, or other components, associated with the re-assigned LUNs. Therefore, no access conflicts will arise between cluster server 18 and any other server 14 over the devices associated with the reassigned LUNs.
FIG. 3 is another version of the network of FIG. 1 and depicts servers 14 and the associated virtual servers 44. As discussed above, cluster software is operable to present services to the users of clustered servers through virtual servers. Instead of providing several separate servers, several virtual servers can co-reside on a single computer system. Thus, each virtual server shares the same computer resources with the other virtual servers residing on the computer system. Virtual servers are indistinguishable from real servers from a user standpoint because virtual servers possess an IP address, a network name and other indicia of a real server. Several virtual servers 44 may reside on cluster server 18. The clustering software may be used to create a group of virtual servers 44 that reside on cluster server 18 and serve as a standby resource groups, or recovery groups. Each server 14 on storage consolidation network 10 has an associated recovery group 44. Each recovery group 44 possesses the same network name and IP address as its associated server 14. For example, recovery groups 44 a, 44 b, 44 c and 44 d are associated with servers 14 a, 14 b, 14 c, and 14 d respectively. Thus, if the network name for server 14 a is “server 1” and its IP address is “1.142.122.20,” then the network name and IP address for recovery group 44 a will also be “server 1” and “1.142.122.20.” If there is more than one cluster server 18 in cluster 16, then it is preferable to create a heartbeat link between the cluster servers 18 and a recovery group 44 for each cluster server 16. The recovery groups are preferably offline, or inactive, during normal operation.
At step 40 of FIG. 2, cluster server 18 activates the recovery group containing the IP address and network name of the failing server 14. For example, if server 14 a failed to respond to the heartbeat signal at step 36, then recovery group 44 a will be brought online. At step 42, the cluster assumes the identity of the failing server via the recovery group associated with the failing server. The cluster now has ownership of the failing server's LUNs and will receive all user requests directed to the failing server. Thus, all of the applications associated with the failing server have migrated to the cluster server 18 through the recovery group. For example, if the failing server was running a file share application, then cluster server 18 will now manage this file server application through the recovery group. Accordingly, the cluster is operable to serve the users of the failing server. Because virtual servers are indistinguishable from real servers from a user standpoint, the user of the failing server will not know that the physical server has changed once the resource is available again. As discussed above, the robustness of this arrangement may be enhanced by increasing the number of cluster servers 18. A multiple-node cluster, wherein the cluster servers 18 monitor each other through a heartbeat mechanism, will generally offer greater reliability than a single member cluster 16. As discussed above, in the event that one cluster server 18 fails, the other cluster servers 18 can assume that server's identity and applications through a recovery group 44 associated with that failing cluster server 18. However, additional expense may be avoided by implementing a single node cluster 16.
There may be situations where it is preferable for the system administrator to manually initiate the recovery process. For example, if the heartbeat mechanism does not detect a failure, then the cluster server 18 will not take over the LUNs of the failing server 14 a and its users will accordingly lose service. Therefore, if the system administrator observes an event that indicates a possible server failure that has not been detected by the heartbeat mechanism, such as an application that has unexpectedly crashed, for example, then the system administrator will need to intervene. In this case, the system administrator may manually reassign the LUNs owned by the failing server 14 a, bring the associated recovery group 44 a online, and take the failing server 14 a offline for troubleshooting and repair.
Once the cluster server 18 has assumed the duties of the failing server 14 a, the system administrator may arrange for the repair of server 14 a without disrupting the other servers 14 on storage consolidation network 10. After the failed server 14 a has been repaired, users may be migrated back to the repaired server 14 a from the cluster server 18. The system administrator offlines or deactivates the recovery group 44 a associated with the repaired server 14 a, integrates the repaired server 14 a back into the storage consolidation network 10, and re-assigns the LUNs back to the repaired server 14 a. Preferably this occurs at night, or when users do not have access to the servers 14.
Although the disclosed embodiments have been described in detail, it should be understood that various changes, substitutions, and alterations can be made to the embodiments without departing from their spirited scope.

Claims (30)

What is claimed is:
1. A system for recovering from the failure of a server in a computer network comprising one or more non-clustered servers, wherein each server possesses a network address, and one or more devices, wherein the devices are communicatively coupled to the network and associated with a LUN address and wherein each LUN address is owned by a server, comprising:
a heartbeat mechanism operable to transmit a heartbeat signal to a server and receive a response from the server, whereby a failing server may be detected if a response to the heartbeat signal is not received;
LUN management software, wherein the LUN management software is operable to re-assign the LUN addresses owned by the failing server when the failing server is detected;
a cluster group comprising at least one cluster server,
wherein the cluster server is operable to receive ownership of the LUN addresses owned by the failing server; and
wherein the cluster server is running cluster software operable for creating a recovery group that is associated with the network address associated with the failing server, and wherein the recovery group is operable to receive a user or computer network request that is directed to the associated network address of the failing server, such that the cluster server is operable to serve the user or run an application associated with the failing server.
2. The system of claim 1, wherein the computer network comprises a SAN storage network.
3. The system of claim 2, wherein the non-clustered servers and the cluster group are communicatively coupled to the SAN storage network.
4. The system of claim 3, wherein the devices comprise storage devices.
5. The system of claim 4, wherein the non-clustered servers and the cluster group are running storage consolidation software, wherein the storage consolidation software is operable to manage the access to the storage devices by the non-clustered servers and the cluster group.
6. The system of claim 5, wherein the storage consolidation software comprises the LUN management software.
7. The system of claim 5, wherein the storage consolidation software is operable to run the heartbeat mechanism.
8. The system of claim 1, wherein the cluster group comprises a plurality of clustered servers and wherein the clustered servers are communicatively coupled to the heartbeat mechanism and the LUN management software such that if a failing clustered server fails to respond to a heartbeat signal, another clustered server may assume the network address and LUN addresses associated with the failing clustered server.
9. The system of claim 1, wherein the LUN management software is operable to mask the LUN addresses owned by the failing server.
10. A method for recovering from the failure of a server in a computer network comprising one or more non-clustered servers, wherein each server possesses a network address, and one or more devices, wherein the devices are communicatively coupled to the network and associated with a LUN address and wherein each LUN address is owned by a server, comprising the steps of:
providing LUN management software, wherein the LUN management software is operable to re-assign the LUN addresses owned by the failing server when the failing server is detected;
providing a cluster group comprising at least one cluster server,
wherein the cluster server is operable to receive ownership of the LUN addresses owned by the failing server; and
wherein the cluster server is running cluster software operable for creating a recovery group that is associated with the network address associated with the failing server, and wherein the recovery group is operable to receive a user or computer network request that is directed to the associated network address of the failing server, such that the cluster server is operable to assume the identity of the failing server and serve the user or run an application associated with the failing server;
monitoring the status of the non-clustered servers;
detecting a failing non-clustered server;
re-assigning the LUNs owned by the failing non-clustered server to the cluster server;
activating the recovery group associated with the failing non-clustered server; and
assuming the identity of the failing non-clustered server.
11. The method of claim 10, further comprising the step of providing a heartbeat mechanism operable to transmit a heartbeat signal to a server and receive a response from the server, whereby a failing server may be detected if a response to the heartbeat signal is not received.
12. The method of claim 11,
wherein the cluster group comprises a plurality of clustered servers and wherein the clustered servers are communicatively coupled to the heartbeat mechanism and the LUN management software such that if a failing clustered server fails to respond to a heartbeat signal, another clustered server may assume the network address and LUN addresses associated with the failing clustered server; and
further comprising the steps of:
monitoring the status of the clustered servers;
detecting a failing clustered server;
re-assigning the LUNs owned by the failing cluster server to another non-failing cluster server;
activating the recovery group associated with the failing cluster server; and
assuming the identity of the failing cluster server.
13. The method of claim 11, wherein the computer network comprises a SAN storage network.
14. The method of claim 13, wherein the non-clustered servers and the cluster group are communicatively coupled to the SAN storage network.
15. The method of claim 14, wherein the devices comprise storage devices.
16. The method of claim 15, wherein the non-clustered servers and the cluster group are running storage consolidation software, wherein the storage consolidation software is operable to manage the access to the storage devices by the non-clustered servers and the cluster group.
17. The method of claim 16, wherein the storage consolidation software comprises the LUN management software.
18. The method of claim 16, wherein the storage consolidation software is operable to run the heartbeat mechanism.
19. The method of claim 10, wherein the LUN management software is operable to mask the LUN addresses owned by the failing server.
20. A computer network comprising:
one or more devices communicatively coupled to the computer network, wherein the devices are each associated with a LUN address, wherein each LUN address is owned by a server coupled to the computer network;
one or more non-clustered servers, wherein each non-clustered server possesses a network address;
a cluster group comprising at least one clustered server,
wherein the cluster server is operable to receive ownership of the LUN addresses owned by a failing server; and
wherein the cluster server is running cluster software operable for creating a recovery group that is associated with the network address associated with the failing server, and wherein the recovery group is operable to receive a user or computer network request that is directed to the network address of the failing server, such that the cluster server is operable to serve the user or run an application with the failing server.
21. The computer network of claim 20, further comprising a heartbeat mechanism operable to transmit a heartbeat signal to each server on the computer network and receive a response from the server, whereby the failing server may be detected by the cluster server if a response to the heartbeat signal is not received.
22. The computer network of claim 21, further comprising LUN management software, wherein the LUN management software is operable to re-assign the LUN addresses owned by the failing server to the recovery group when the failing server is detected.
23. The computer network of claim 22,
wherein the cluster group comprises a plurality of clustered servers,
wherein each clustered server is possesses a network address and may possess a LUN address, and
wherein the clustered servers are communicatively coupled to the heartbeat mechanism and the LUN management software such that if a failing clustered server fails to respond to a heartbeat signal, another clustered server may assume the network address and LUN addresses associated with the failing clustered server.
24. The computer network of claim 22, wherein the LUN management software is operable to mask the LUN address owned by the failing server.
25. The computer network of claim 20, wherein the computer network further comprises a SAN storage network.
26. The computer network of claim 25, wherein the non-clustered servers and the cluster group are communicatively coupled to the SAN storage network.
27. The computer network of claim 26, wherein the devices comprise storage devices.
28. The computer network of claim 27, wherein the non-clustered servers and the cluster group are running storage consolidation software, wherein the storage consolidation software is operable to manage the access to the storage devices by the non-clustered servers and the cluster group.
29. The computer network of claim 28, wherein the storage consolidation software comprises the LUN management software.
30. The computer network of claim 28, wherein the storage consolidation software is operable to run the heartbeat mechanism.
US09/637,093 2000-08-10 2000-08-10 Cluster-based system and method of recovery from server failures Expired - Lifetime US6609213B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/637,093 US6609213B1 (en) 2000-08-10 2000-08-10 Cluster-based system and method of recovery from server failures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/637,093 US6609213B1 (en) 2000-08-10 2000-08-10 Cluster-based system and method of recovery from server failures

Publications (1)

Publication Number Publication Date
US6609213B1 true US6609213B1 (en) 2003-08-19

Family

ID=27734917

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/637,093 Expired - Lifetime US6609213B1 (en) 2000-08-10 2000-08-10 Cluster-based system and method of recovery from server failures

Country Status (1)

Country Link
US (1) US6609213B1 (en)

Cited By (201)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020035669A1 (en) * 2000-09-19 2002-03-21 Sung-Hoon Baek Apparatus for redundant interconnection between multiple hosts and raid
US20020095496A1 (en) * 2001-01-17 2002-07-18 Antes Mark L. Methods, systems and computer program products for transferring security processing between processors in a cluster computing environment
US20020095603A1 (en) * 2001-01-17 2002-07-18 Godwin James Russell Methods, systems and computer program products for providing data from network secure communications in a cluster computing environment
US20020124201A1 (en) * 2001-03-01 2002-09-05 International Business Machines Corporation Method and system for log repair action handling on a logically partitioned multiprocessing system
US20020133601A1 (en) * 2001-03-16 2002-09-19 Kennamer Walter J. Failover of servers over which data is partitioned
US20020170004A1 (en) * 2001-05-08 2002-11-14 Shugart Technology, Inc. Storage area network monitor device and networked monitor system
US20020188718A1 (en) * 2001-05-04 2002-12-12 Rlx Technologies, Inc. Console information storage system and method
US20020188711A1 (en) * 2001-02-13 2002-12-12 Confluence Networks, Inc. Failover processing in a storage system
US20020188709A1 (en) * 2001-05-04 2002-12-12 Rlx Technologies, Inc. Console information server system and method
US20030014480A1 (en) * 2001-07-16 2003-01-16 Sam Pullara Method and apparatus for session replication and failover
US20030014526A1 (en) * 2001-07-16 2003-01-16 Sam Pullara Hardware load-balancing apparatus for session replication
US20030018732A1 (en) * 2001-07-16 2003-01-23 Jacobs Dean Bernard Data replication protocol
US20030018813A1 (en) * 2001-01-17 2003-01-23 Antes Mark L. Methods, systems and computer program products for providing failure recovery of network secure communications in a cluster computing environment
US20030018927A1 (en) * 2001-07-23 2003-01-23 Gadir Omar M.A. High-availability cluster virtual server system
US20030023898A1 (en) * 2001-07-16 2003-01-30 Jacobs Dean Bernard Layered architecture for data replication
US20030028819A1 (en) * 2001-05-07 2003-02-06 International Business Machines Corporation Method and apparatus for a global cache directory in a storage cluster
US20030046230A1 (en) * 2001-08-30 2003-03-06 Jacobs Dean Bernard Method for maintaining account consistency
US20030051021A1 (en) * 2001-09-05 2003-03-13 Hirschfeld Robert A. Virtualized logical server cloud
US20030061319A1 (en) * 2001-09-27 2003-03-27 Manzardo Marcel B. Method and apparatus for providing back-up capability in a communication system
US20030069953A1 (en) * 2001-09-28 2003-04-10 Bottom David A. Modular server architecture with high-availability management capability
US20030084100A1 (en) * 2001-11-01 2003-05-01 Gahan Richard A. Server monitoring and failover mechanism
US20030088803A1 (en) * 2001-11-08 2003-05-08 Raidcore, Inc. Rebuilding redundant disk arrays using distributed hot spare space
US20030097610A1 (en) * 2001-11-21 2003-05-22 Exanet, Inc. Functional fail-over apparatus and method of operation thereof
US20030126240A1 (en) * 2001-12-14 2003-07-03 Frank Vosseler Method, system and computer program product for monitoring objects in an it network
US20030163761A1 (en) * 2002-02-21 2003-08-28 Michael Chen System and method for message driven bean service migration
US20030182427A1 (en) * 2002-02-21 2003-09-25 Halpern Eric M. Systems and methods for automated service migration
US20030182001A1 (en) * 2000-08-25 2003-09-25 Milena Radenkovic Audio data processing
US20040010583A1 (en) * 2002-07-10 2004-01-15 Nortel Networks Limited Method and apparatus for defining failover events in a network device
US20040010584A1 (en) * 2002-07-15 2004-01-15 Peterson Alec H. System and method for monitoring state information in a network
US20040059850A1 (en) * 2002-09-19 2004-03-25 Hipp Christopher G. Modular server processing card system and method
US20040153704A1 (en) * 2001-02-09 2004-08-05 Jurgen Bragulla Automatic startup of a cluster system after occurrence of a recoverable error
US6823477B1 (en) * 2001-01-23 2004-11-23 Adaptec, Inc. Method and apparatus for a segregated interface for parameter configuration in a multi-path failover system
US20040243702A1 (en) * 2003-05-27 2004-12-02 Vainio Jukka A. Data collection in a computer cluster
WO2004107196A1 (en) * 2003-05-27 2004-12-09 Nokia Corporation Data collection in a computer cluster
US20050010715A1 (en) * 2003-04-23 2005-01-13 Dot Hill Systems Corporation Network storage appliance with integrated server and redundant storage controllers
US20050021696A1 (en) * 2000-10-24 2005-01-27 Hunt Galen C. System and method providing automatic policy enforcement in a multi-computer service application
US20050033778A1 (en) * 2000-12-21 2005-02-10 Price Daniel M. Method of improving the availability of a computer clustering system through the use of a network medium link state function
US20050036483A1 (en) * 2003-08-11 2005-02-17 Minoru Tomisaka Method and system for managing programs for web service system
US20050071596A1 (en) * 2003-09-26 2005-03-31 International Business Machines Corporation Method, apparatus and program storage device for providing automatic performance optimization of virtualized storage allocation within a network of storage elements
US20050097058A1 (en) * 2000-10-24 2005-05-05 Microsoft Corporation System and method for distributed management of shared computers
US20050102549A1 (en) * 2003-04-23 2005-05-12 Dot Hill Systems Corporation Network storage appliance with an integrated switch
US20050102538A1 (en) * 2000-10-24 2005-05-12 Microsoft Corporation System and method for designing a logical model of a distributed computer system and deploying physical resources according to the logical model
US20050102559A1 (en) * 2003-11-10 2005-05-12 Nokia Corporation Computer cluster, computer unit and method to control storage access between computer units
US20050108593A1 (en) * 2003-11-14 2005-05-19 Dell Products L.P. Cluster failover from physical node to virtual node
US20050108187A1 (en) * 2003-11-05 2005-05-19 Hitachi, Ltd. Apparatus and method of heartbeat mechanism using remote mirroring link for multiple storage system
US20050125557A1 (en) * 2003-12-08 2005-06-09 Dell Products L.P. Transaction transfer during a failover of a cluster controller
US20050132379A1 (en) * 2003-12-11 2005-06-16 Dell Products L.P. Method, system and software for allocating information handling system resources in response to high availability cluster fail-over events
US20050144268A1 (en) * 2003-12-08 2005-06-30 Mohammad El-Batal Managing spare devices on a finite network
US20050149684A1 (en) * 2003-12-30 2005-07-07 Dell Products L.P. Distributed failover aware storage area network backup of application data in an active-N high availability cluster
US20050160335A1 (en) * 2002-07-15 2005-07-21 Peterson Alec H. System and method for monitoring state information in a network
US6928589B1 (en) * 2004-01-23 2005-08-09 Hewlett-Packard Development Company, L.P. Node management in high-availability cluster
US20050177779A1 (en) * 2004-01-23 2005-08-11 Pomaranski Ken G. Cluster node status detection and communication
US20050188265A1 (en) * 2004-01-23 2005-08-25 Pomaranski Ken G. Multi-state status reporting for high-availability cluster nodes
US20050192993A1 (en) * 2002-05-23 2005-09-01 Bea Systems, Inc. System and method for performing commutative operations in data access systems
US20050193238A1 (en) * 2001-10-12 2005-09-01 Dell Products L.P. System and method for providing automatic data restoration after a storage device failure
US20050193245A1 (en) * 2004-02-04 2005-09-01 Hayden John M. Internet protocol based disaster recovery of a server
US20050192971A1 (en) * 2000-10-24 2005-09-01 Microsoft Corporation System and method for restricting data transfers and managing software components of distributed computers
US20050207105A1 (en) * 2003-04-23 2005-09-22 Dot Hill Systems Corporation Apparatus and method for deterministically performing active-active failover of redundant servers in a network storage appliance
US6957254B1 (en) * 1999-10-21 2005-10-18 Sun Microsystems, Inc Method and apparatus for reaching agreement between nodes in a distributed system
US20050246568A1 (en) * 2003-04-23 2005-11-03 Dot Hill Systems Corporation Apparatus and method for deterministically killing one of redundant servers integrated within a network storage appliance chassis
US20050262101A1 (en) * 2004-05-20 2005-11-24 Bea Systems, Inc. System and method for performing batch configuration changes
US20050268156A1 (en) * 2001-08-09 2005-12-01 Dell Products L.P. Failover system and method for cluster environment
US20050267920A1 (en) * 2004-05-13 2005-12-01 Fabrice Helliker System and method for archiving data in a clustered environment
US20050289540A1 (en) * 2004-06-24 2005-12-29 Lu Nguyen Providing on-demand capabilities using virtual machines and clustering processes
US20060004959A1 (en) * 2002-01-18 2006-01-05 Bea Systems, Inc. System and method for heterogeneous caching
US6985967B1 (en) 2000-07-20 2006-01-10 Rlx Technologies, Inc. Web server network system and method
US20060036903A1 (en) * 2004-08-11 2006-02-16 Dubal Kamlesh I Managing access to spare data storage devices
US20060048017A1 (en) * 2004-08-30 2006-03-02 International Business Machines Corporation Techniques for health monitoring and control of application servers
US20060053336A1 (en) * 2004-09-08 2006-03-09 Pomaranski Ken G High-availability cluster node removal and communication
US20060053330A1 (en) * 2004-09-08 2006-03-09 Pomaranski Ken G Smart card for high-availability clustering
US20060053337A1 (en) * 2004-09-08 2006-03-09 Pomaranski Ken G High-availability cluster with proactive maintenance
US7043580B1 (en) * 2003-01-17 2006-05-09 Unisys Corporation Cluster lock server: ability to support multiple standard and proprietary locking protocols
US20060112244A1 (en) * 2004-11-24 2006-05-25 International Business Machines Corporation Automatically managing the state of replicated data of a computing environment
US20060123066A1 (en) * 2001-08-30 2006-06-08 Bea Systems, Inc. Cluster caching with concurrency checking
US20060123199A1 (en) * 2002-01-18 2006-06-08 Bea Systems, Inc. System and method for optimistic caching
US20060129759A1 (en) * 2004-11-30 2006-06-15 International Business Machines Corporation Method and system for error strategy in a storage system
US20060129666A1 (en) * 2004-12-09 2006-06-15 International Business Machines Corporation Selective device reset method for device sharing with fail-over
US20060129980A1 (en) * 2004-11-15 2006-06-15 David Schmidt Dynamically updatable and easily scalable command line parser using a centralized data schema
US20060129872A1 (en) * 2002-02-22 2006-06-15 Fung Priscilla C Apparatus for highly available transaction recovery for transaction processing systems
US20060161753A1 (en) * 2005-01-18 2006-07-20 Aschoff John G Method, apparatus and program storage device for providing automatic performance optimization of virtualized storage allocation within a virtualized storage subsystem
US20060173851A1 (en) * 2005-01-28 2006-08-03 Singh Sumankumar A Systems and methods for accessing data
US7093288B1 (en) 2000-10-24 2006-08-15 Microsoft Corporation Using packet filters and network virtualization to restrict network communications
US7099915B1 (en) * 2000-06-30 2006-08-29 Cisco Technology, Inc. Server load balancing method and system
US20060271814A1 (en) * 2002-02-22 2006-11-30 Bea Systems, Inc. Method for highly available transaction recovery for transaction processing systems
US7149923B1 (en) * 2003-01-17 2006-12-12 Unisys Corporation Software control using the controller as a component to achieve resiliency in a computer system utilizing separate servers for redundancy
US7155638B1 (en) * 2003-01-17 2006-12-26 Unisys Corporation Clustered computer system utilizing separate servers for redundancy in which the host computers are unaware of the usage of separate servers
CN1299203C (en) * 2004-09-14 2007-02-07 中国人民解放军上海警备区司令部指挥自动化工作站 Data disaster tocerance backup control system
US20070058528A1 (en) * 2005-09-12 2007-03-15 Microsoft Corporation Fault-Tolerant Communications In Routed Networks
US20070067613A1 (en) * 2003-05-09 2007-03-22 Kenichi Mizoguchi Computer system and failed computer replacing method to the same system
US7200622B2 (en) 2004-03-19 2007-04-03 Hitachi, Ltd. Inter-server dynamic transfer method for virtual file servers
US7203730B1 (en) 2001-02-13 2007-04-10 Network Appliance, Inc. Method and apparatus for identifying storage devices
US7209968B1 (en) * 2001-05-29 2007-04-24 Agilent Technologies, Inc. System and method for recovering management of network element(s) responsive to failure of a distributed gateway
US20070143552A1 (en) * 2005-12-21 2007-06-21 Cisco Technology, Inc. Anomaly detection for storage traffic in a data center
US7243374B2 (en) 2001-08-08 2007-07-10 Microsoft Corporation Rapid application security threat analysis
US7246255B1 (en) * 2003-01-17 2007-07-17 Unisys Corporation Method for shortening the resynchronization time following failure in a computer system utilizing separate servers for redundancy
US20070174658A1 (en) * 2005-11-29 2007-07-26 Yoshifumi Takamoto Failure recovery method
EP1816564A1 (en) * 2004-10-12 2007-08-08 Fujitsu Ltd. Resource exchange processing program and resource exchange processing method
US20070192320A1 (en) * 2001-08-30 2007-08-16 Bea Systems, Inc. System and Method for Flushing Bean Cache
US20070220135A1 (en) * 2006-03-16 2007-09-20 Honeywell International Inc. System and method for computer service security
US20070250619A1 (en) * 2006-04-24 2007-10-25 Inventec Corporation Real-time heartbeat frequency regulation system and method utilizing user-requested frequency
US20070250594A1 (en) * 2006-04-25 2007-10-25 Nec Corporation File sharing method and file sharing system
US7313735B1 (en) * 2004-04-30 2007-12-25 Sun Microsystems, Inc. In-line server health checking
US20080016387A1 (en) * 2006-06-29 2008-01-17 Dssdr, Llc Data transfer and recovery process
US20080077635A1 (en) * 2006-09-22 2008-03-27 Digital Bazaar, Inc. Highly Available Clustered Storage Network
CN100378678C (en) * 2005-08-10 2008-04-02 英业达股份有限公司 Backup regression management and control method and system for cluster computer equipment
US20080126829A1 (en) * 2006-08-26 2008-05-29 International Business Machines Corporation Simulation of failure recovery within clustered systems
US20080209136A1 (en) * 2007-02-28 2008-08-28 Yanling Qi System and method of storage system assisted i/o fencing for shared storage configuration
US20080250267A1 (en) * 2007-04-04 2008-10-09 Brown David E Method and system for coordinated multiple cluster failover
US7437594B1 (en) * 2000-08-11 2008-10-14 America Online, Inc. Server-side session management
US20080263255A1 (en) * 2007-04-20 2008-10-23 International Business Machines Corporation Apparatus, System, and Method For Adapter Card Failover
US20080263391A1 (en) * 2007-04-20 2008-10-23 International Business Machines Corporation Apparatus, System, and Method For Adapter Card Failover
US20090006885A1 (en) * 2007-06-28 2009-01-01 Pattabhiraman Ramesh V Heartbeat distribution that facilitates recovery in the event of a server failure during a user dialog
US7478177B2 (en) 2006-07-28 2009-01-13 Dell Products L.P. System and method for automatic reassignment of shared storage on blade replacement
US20090016251A1 (en) * 2007-07-13 2009-01-15 Gainspan, Inc. Management method and system of low power consuming devices
US7480816B1 (en) 2005-08-04 2009-01-20 Sun Microsystems, Inc. Failure chain detection and recovery in a group of cooperating systems
CN100463411C (en) * 2005-01-27 2009-02-18 国际商业机器公司 Controlling service failover in clustered storage apparatus networks and opration method thereof
WO2009030363A1 (en) * 2007-09-03 2009-03-12 Abb Research Ltd. Redundant, distributed computer system having server functionalities
US7539127B1 (en) * 2001-12-13 2009-05-26 Cisco Technology, Inc. System and method for recovering from endpoint failure in a communication session
US7565568B1 (en) * 2004-02-27 2009-07-21 Veritas Operating Corporation Method and system for virtualization switch failover
US7567504B2 (en) 2003-06-30 2009-07-28 Microsoft Corporation Network load balancing with traffic routing
US7574343B2 (en) 2000-10-24 2009-08-11 Microsoft Corporation System and method for logical modeling of distributed computer systems
US7590736B2 (en) 2003-06-30 2009-09-15 Microsoft Corporation Flexible network load balancing
US7606929B2 (en) 2003-06-30 2009-10-20 Microsoft Corporation Network load balancing with connection manipulation
US20090265510A1 (en) * 2008-04-17 2009-10-22 Dell Products L.P. Systems and Methods for Distributing Hot Spare Disks In Storage Arrays
US7613822B2 (en) 2003-06-30 2009-11-03 Microsoft Corporation Network load balancing with session information
US20090276612A1 (en) * 2008-04-30 2009-11-05 International Business Machines Corporation Implementation of sparing policies for servers
US7630877B2 (en) 2003-03-06 2009-12-08 Microsoft Corporation Architecture for distributed computing system and automated design, deployment, and management of distributed applications
US7636917B2 (en) 2003-06-30 2009-12-22 Microsoft Corporation Network load balancing with host status information
US7669235B2 (en) 2004-04-30 2010-02-23 Microsoft Corporation Secure domain join for computing devices
US7684964B2 (en) 2003-03-06 2010-03-23 Microsoft Corporation Model and system state synchronization
US20100077250A1 (en) * 2006-12-04 2010-03-25 Electronics And Telecommunications Research Instit Ute Virtualization based high availability cluster system and method for managing failure in virtualization based high availability cluster system
US7689676B2 (en) 2003-03-06 2010-03-30 Microsoft Corporation Model-based policy application
US7711978B1 (en) 2004-12-30 2010-05-04 Symantec Operating Corporation Proactive utilization of fabric events in a network virtualization environment
US7730489B1 (en) * 2003-12-10 2010-06-01 Oracle America, Inc. Horizontally scalable and reliable distributed transaction management in a clustered application server environment
US7739543B1 (en) * 2003-04-23 2010-06-15 Netapp, Inc. System and method for transport-level failover for loosely coupled iSCSI target devices
US20100191948A1 (en) * 2009-01-23 2010-07-29 Hitachi, Ltd. Boot control method of computer system
US7778422B2 (en) 2004-02-27 2010-08-17 Microsoft Corporation Security associations for devices
US20100217792A1 (en) * 2009-02-24 2010-08-26 Yu Wang Method and apparatus for distributed backup of computer data
US7792931B2 (en) 2003-03-06 2010-09-07 Microsoft Corporation Model-based system provisioning
US7797147B2 (en) 2005-04-15 2010-09-14 Microsoft Corporation Model-based system monitoring
US7802144B2 (en) 2005-04-15 2010-09-21 Microsoft Corporation Model-based system monitoring
US7814491B1 (en) * 2004-04-14 2010-10-12 Oracle America, Inc. Method and apparatus for managing system resources using a container model
US20100281181A1 (en) * 2003-09-26 2010-11-04 Surgient, Inc. Network abstraction and isolation layer for masquerading machine identity of a computer
US7890798B1 (en) 2004-03-22 2011-02-15 Hewlett-Packard Development Company, L.P. Computer cluster with second-node instance of application having access to state snapshot of first-node instance of application
US20110055891A1 (en) * 2009-08-26 2011-03-03 Rice Christopher T Device security
US20110060824A1 (en) * 2007-12-17 2011-03-10 Johan Lundstrom Signalling Proxy System for a Switching Center Server
US7921169B2 (en) 2001-09-06 2011-04-05 Oracle International Corporation System and method for exactly once message store communication
US7941309B2 (en) 2005-11-02 2011-05-10 Microsoft Corporation Modeling IT operations/policies
US8078718B1 (en) * 2004-01-07 2011-12-13 Network Appliance, Inc. Method and apparatus for testing a storage system head in a clustered failover configuration
US8078728B1 (en) 2006-03-31 2011-12-13 Quest Software, Inc. Capacity pooling for application reservation and delivery
US20120072604A1 (en) * 2009-05-29 2012-03-22 France Telecom technique for delivering content to a user
US20120102135A1 (en) * 2010-10-22 2012-04-26 Netapp, Inc. Seamless takeover of a stateful protocol session in a virtual machine environment
US8185776B1 (en) * 2004-09-30 2012-05-22 Symantec Operating Corporation System and method for monitoring an application or service group within a cluster as a resource of another cluster
US8194674B1 (en) 2007-12-20 2012-06-05 Quest Software, Inc. System and method for aggregating communications and for translating between overlapping internal network addresses and unique external network addresses
US8244998B1 (en) * 2008-12-11 2012-08-14 Symantec Corporation Optimized backup for a clustered storage system
US20120240119A1 (en) * 2009-12-07 2012-09-20 Zte Corporation Method and device for file transfer protocol deadlock detection and self recovery
US8316110B1 (en) * 2003-12-18 2012-11-20 Symantec Operating Corporation System and method for clustering standalone server applications and extending cluster functionality
US20130067269A1 (en) * 2011-09-08 2013-03-14 Infinidat Ltd. Object based storage system and method of operating thereof
US8402230B2 (en) 2010-09-10 2013-03-19 International Business Machines Corporation Recoverability while adding storage to a redirect-on-write storage pool
US8489728B2 (en) 2005-04-15 2013-07-16 Microsoft Corporation Model-based system monitoring
US8549513B2 (en) 2005-06-29 2013-10-01 Microsoft Corporation Model-based virtual system provisioning
US8621260B1 (en) 2010-10-29 2013-12-31 Symantec Corporation Site-level sub-cluster dependencies
US20140095671A1 (en) * 2012-08-24 2014-04-03 Tencent Technology (Shenzhen) Company Limited Method and system for pushing message box
US8707082B1 (en) * 2009-10-29 2014-04-22 Symantec Corporation Method and system for enhanced granularity in fencing operations
US8725979B1 (en) * 2012-01-30 2014-05-13 Netapp, Inc. Efficient methods and systems for allocating storage volumes
WO2014066161A3 (en) * 2012-10-22 2014-06-19 Cassidian Communications, Inc. Clustered session management
US8775867B2 (en) 2011-03-31 2014-07-08 International Business Machines Corporation Method and system for using a standby server to improve redundancy in a dual-node data storage system
US8909886B1 (en) 2012-03-31 2014-12-09 Emc Corporation System and method for improving cache performance upon detecting a migration event
US8914583B1 (en) 2012-03-31 2014-12-16 Emc Corporation System and method for improving cache performance
US8929856B1 (en) 2014-02-07 2015-01-06 Cassidian Communications, Inc. Emergency services routing proxy cluster management
US20150046745A1 (en) * 2009-11-25 2015-02-12 Netapp, Inc. Method and system for transparently replacing nodes of a clustered storage system
US8966190B1 (en) * 2012-03-31 2015-02-24 Emc Corporation System and method for assigning control of a logical unit number
US8990613B2 (en) 2006-06-29 2015-03-24 Dssdr, Llc Data transfer and recovery
US9015520B2 (en) 2006-06-29 2015-04-21 Dssdr, Llc Data transfer and recovery
US20150172111A1 (en) * 2013-12-14 2015-06-18 Netapp, Inc. Techniques for san storage cluster synchronous disaster recovery
US9137383B2 (en) 2011-06-17 2015-09-15 Airbus Ds Communications, Inc. Systems, apparatus, and methods for collaborative and distributed emergency multimedia data management
US9183560B2 (en) 2010-05-28 2015-11-10 Daniel H. Abelow Reality alternate
US9280428B2 (en) 2013-04-23 2016-03-08 Neftali Ripoll Method for designing a hyper-visor cluster that does not require a shared storage device
CN105429776A (en) * 2014-09-22 2016-03-23 中兴通讯股份有限公司 Method and system for virtualized network function management
US9391879B2 (en) 2013-09-25 2016-07-12 Airbus Ds Communications, Inc. Mixed media call routing
US9507678B2 (en) * 2014-11-13 2016-11-29 Netapp, Inc. Non-disruptive controller replacement in a cross-cluster redundancy configuration
US9639414B1 (en) * 2015-03-25 2017-05-02 EMC IP Holding Co., LLC Remote real-time storage system monitoring and management
US9801310B2 (en) 2013-04-03 2017-10-24 International Business Machines Corporation Server cooling system without the use of vapor compression refrigeration
US20170374163A1 (en) * 2014-11-04 2017-12-28 Comcast Cable Communications, Llc Systems And Methods For Data Routing Management
US9948707B2 (en) 2014-10-17 2018-04-17 International Business Machines Corporation Reconnection of a client to a server in a transaction processing server cluster
US10085367B2 (en) 2015-03-12 2018-09-25 International Business Machines Corporation Minimizing leakage in liquid cooled electronic equipment
US10098258B2 (en) 2015-03-12 2018-10-09 International Business Machines Corporation Minimizing leakage in liquid cooled electronic equipment
US20180329760A1 (en) * 2011-11-19 2018-11-15 International Business Machines Corporation Work Distribution and Management in High Availability Cluster Environment of Resource Adapters
US10169175B2 (en) * 2015-04-30 2019-01-01 Ge Aviation Systems Llc Providing failover control on a control system
CN109117317A (en) * 2018-11-01 2019-01-01 郑州云海信息技术有限公司 A kind of clustering fault restoration methods and relevant apparatus
US20190229978A1 (en) * 2018-01-24 2019-07-25 Hewlett Packard Enterprise Development Lp Designation of a standby node
US10594553B2 (en) 2016-12-21 2020-03-17 Mastercard International Incorporated Systems and methods for dynamically commissioning and decommissioning computer components
US10826811B1 (en) * 2014-02-11 2020-11-03 Quest Software Inc. System and method for managing clustered radio networks
US10853206B1 (en) * 2008-04-03 2020-12-01 United Services Automobile Association Systems and methods for enabling failover support with multiple backup data storage structures
CN112152837A (en) * 2020-08-14 2020-12-29 上海纽盾科技股份有限公司 Method, device and system for realizing intelligent supervision of network security equipment
US10926250B2 (en) 2017-12-01 2021-02-23 Exxonmobil Chemical Patents Inc. Catalyst systems and polymerization processes for using the same
CN114296919A (en) * 2021-12-27 2022-04-08 北京天融信网络安全技术有限公司 Server online control method and device
US11539602B2 (en) * 2020-08-24 2022-12-27 T-Mobile Usa, Inc. Continuous monitoring of containers using monitor containers configured as sidecar containers
US11637896B1 (en) * 2020-02-25 2023-04-25 Pure Storage, Inc. Migrating applications to a cloud-computing environment
CN116743550A (en) * 2023-08-11 2023-09-12 之江实验室 Processing method of fault storage nodes of distributed storage cluster
US11868622B2 (en) 2020-02-25 2024-01-09 Pure Storage, Inc. Application recovery across storage systems

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479653A (en) 1994-07-14 1995-12-26 Dellusa, L.P. Disk array apparatus and method which supports compound raid configurations and spareless hot sparing
US5796934A (en) * 1996-05-31 1998-08-18 Oracle Corporation Fault tolerant client server system
US5805785A (en) * 1996-02-27 1998-09-08 International Business Machines Corporation Method for monitoring and recovery of subsystems in a distributed/clustered system
US5812751A (en) * 1995-05-19 1998-09-22 Compaq Computer Corporation Multi-server fault tolerance using in-band signalling
US5996086A (en) * 1997-10-14 1999-11-30 Lsi Logic Corporation Context-based failover architecture for redundant servers
US6014669A (en) 1997-10-01 2000-01-11 Sun Microsystems, Inc. Highly-available distributed cluster configuration database
WO2000019337A1 (en) 1998-09-30 2000-04-06 Harris Corporation Backing up microsoft clustered database
US6055574A (en) 1998-03-10 2000-04-25 Unisys Corporation Method of providing a service through a server with a virtual single network address
US6067545A (en) 1997-08-01 2000-05-23 Hewlett-Packard Company Resource rebalancing in networked computer systems
US6496942B1 (en) * 1998-08-25 2002-12-17 Network Appliance, Inc. Coordinating persistent status information with multiple file servers
US6523130B1 (en) * 1999-03-11 2003-02-18 Microsoft Corporation Storage system having error detection and recovery
US6526521B1 (en) * 1999-06-18 2003-02-25 Emc Corporation Methods and apparatus for providing data storage access

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479653A (en) 1994-07-14 1995-12-26 Dellusa, L.P. Disk array apparatus and method which supports compound raid configurations and spareless hot sparing
US5812751A (en) * 1995-05-19 1998-09-22 Compaq Computer Corporation Multi-server fault tolerance using in-band signalling
US5805785A (en) * 1996-02-27 1998-09-08 International Business Machines Corporation Method for monitoring and recovery of subsystems in a distributed/clustered system
US5796934A (en) * 1996-05-31 1998-08-18 Oracle Corporation Fault tolerant client server system
US6067545A (en) 1997-08-01 2000-05-23 Hewlett-Packard Company Resource rebalancing in networked computer systems
US6014669A (en) 1997-10-01 2000-01-11 Sun Microsystems, Inc. Highly-available distributed cluster configuration database
US5996086A (en) * 1997-10-14 1999-11-30 Lsi Logic Corporation Context-based failover architecture for redundant servers
US6055574A (en) 1998-03-10 2000-04-25 Unisys Corporation Method of providing a service through a server with a virtual single network address
US6496942B1 (en) * 1998-08-25 2002-12-17 Network Appliance, Inc. Coordinating persistent status information with multiple file servers
WO2000019337A1 (en) 1998-09-30 2000-04-06 Harris Corporation Backing up microsoft clustered database
US6523130B1 (en) * 1999-03-11 2003-02-18 Microsoft Corporation Storage system having error detection and recovery
US6526521B1 (en) * 1999-06-18 2003-02-25 Emc Corporation Methods and apparatus for providing data storage access

Cited By (393)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6957254B1 (en) * 1999-10-21 2005-10-18 Sun Microsystems, Inc Method and apparatus for reaching agreement between nodes in a distributed system
US7099915B1 (en) * 2000-06-30 2006-08-29 Cisco Technology, Inc. Server load balancing method and system
US6985967B1 (en) 2000-07-20 2006-01-10 Rlx Technologies, Inc. Web server network system and method
US7437594B1 (en) * 2000-08-11 2008-10-14 America Online, Inc. Server-side session management
US20030182001A1 (en) * 2000-08-25 2003-09-25 Milena Radenkovic Audio data processing
US20020035669A1 (en) * 2000-09-19 2002-03-21 Sung-Hoon Baek Apparatus for redundant interconnection between multiple hosts and raid
US6978346B2 (en) * 2000-09-19 2005-12-20 Electronics And Telecommunications Reseach Institute Apparatus for redundant interconnection between multiple hosts and raid
US7739380B2 (en) 2000-10-24 2010-06-15 Microsoft Corporation System and method for distributed management of shared computers
US7711121B2 (en) 2000-10-24 2010-05-04 Microsoft Corporation System and method for distributed management of shared computers
US20050097147A1 (en) * 2000-10-24 2005-05-05 Microsoft Corporation System and method for distributed management of shared computers
US20060259609A1 (en) * 2000-10-24 2006-11-16 Microsoft Corporation System and Method for Distributed Management of Shared Computers
US7370103B2 (en) 2000-10-24 2008-05-06 Hunt Galen C System and method for distributed management of shared computers
US20050102538A1 (en) * 2000-10-24 2005-05-12 Microsoft Corporation System and method for designing a logical model of a distributed computer system and deploying physical resources according to the logical model
US20050108381A1 (en) * 2000-10-24 2005-05-19 Microsoft Corporation System and method for distributed management of shared computers
US7096258B2 (en) 2000-10-24 2006-08-22 Microsoft Corporation System and method providing automatic policy enforcement in a multi-computer service application
US7093288B1 (en) 2000-10-24 2006-08-15 Microsoft Corporation Using packet filters and network virtualization to restrict network communications
US20050021697A1 (en) * 2000-10-24 2005-01-27 Hunt Galen C. System and method providing automatic policy enforcement in a multi-computer service application
US7080143B2 (en) 2000-10-24 2006-07-18 Microsoft Corporation System and method providing automatic policy enforcement in a multi-computer service application
US7395320B2 (en) 2000-10-24 2008-07-01 Microsoft Corporation Providing automatic policy enforcement in a multi-computer service application
US7043545B2 (en) 2000-10-24 2006-05-09 Microsoft Corporation System and method for restricting data transfers and managing software components of distributed computers
US20060069758A1 (en) * 2000-10-24 2006-03-30 Microsoft Corporation Providing automatic policy enforcement in a multi-computer service application
US7406517B2 (en) * 2000-10-24 2008-07-29 Microsoft Corporation System and method for distributed management of shared computers
US20050021696A1 (en) * 2000-10-24 2005-01-27 Hunt Galen C. System and method providing automatic policy enforcement in a multi-computer service application
US7606898B1 (en) 2000-10-24 2009-10-20 Microsoft Corporation System and method for distributed management of shared computers
US7200655B2 (en) 2000-10-24 2007-04-03 Microsoft Corporation System and method for distributed management of shared computers
US7155380B2 (en) 2000-10-24 2006-12-26 Microsoft Corporation System and method for designing a logical model of a distributed computer system and deploying physical resources according to the logical model
US7574343B2 (en) 2000-10-24 2009-08-11 Microsoft Corporation System and method for logical modeling of distributed computer systems
US20050097058A1 (en) * 2000-10-24 2005-05-05 Microsoft Corporation System and method for distributed management of shared computers
US20050192971A1 (en) * 2000-10-24 2005-09-01 Microsoft Corporation System and method for restricting data transfers and managing software components of distributed computers
US7409395B2 (en) * 2000-12-21 2008-08-05 Emc Corporation Method of improving the availability of a computer clustering system through the use of a network medium link state function
US20050033778A1 (en) * 2000-12-21 2005-02-10 Price Daniel M. Method of improving the availability of a computer clustering system through the use of a network medium link state function
US7340530B2 (en) 2001-01-17 2008-03-04 International Business Machines Corporation Methods, for providing data from network secure communications in a cluster computing environment
US20020095496A1 (en) * 2001-01-17 2002-07-18 Antes Mark L. Methods, systems and computer program products for transferring security processing between processors in a cluster computing environment
US20020095603A1 (en) * 2001-01-17 2002-07-18 Godwin James Russell Methods, systems and computer program products for providing data from network secure communications in a cluster computing environment
US8972475B2 (en) 2001-01-17 2015-03-03 International Business Machines Corporation Network secure communications in a cluster computing environment
US6941366B2 (en) * 2001-01-17 2005-09-06 International Business Machines Corporation Methods, systems and computer program products for transferring security processing between processors in a cluster computing environment
US20080098126A1 (en) * 2001-01-17 2008-04-24 International Business Machines Corporation Network secure communications in a cluster computing environment
US20030018813A1 (en) * 2001-01-17 2003-01-23 Antes Mark L. Methods, systems and computer program products for providing failure recovery of network secure communications in a cluster computing environment
US7146432B2 (en) 2001-01-17 2006-12-05 International Business Machines Corporation Methods, systems and computer program products for providing failure recovery of network secure communications in a cluster computing environment
US6823477B1 (en) * 2001-01-23 2004-11-23 Adaptec, Inc. Method and apparatus for a segregated interface for parameter configuration in a multi-path failover system
US7167999B2 (en) 2001-01-23 2007-01-23 Adaptec, Inc. Methods and apparatus for a segregated interface for parameter configuration in multi-path failover system
US20050060613A1 (en) * 2001-01-23 2005-03-17 Adaptec, Inc. Methods and apparatus for a segregated interface for parameter configuration in a multi-path failover system
US7373542B2 (en) * 2001-02-09 2008-05-13 Siemens Aktiengesellschaft Automatic startup of a cluster system after occurrence of a recoverable error
US20040153704A1 (en) * 2001-02-09 2004-08-05 Jurgen Bragulla Automatic startup of a cluster system after occurrence of a recoverable error
US7734712B1 (en) 2001-02-13 2010-06-08 Netapp, Inc. Method and system for identifying storage devices
US7415506B2 (en) 2001-02-13 2008-08-19 Netapp, Inc. Storage virtualization and storage management to provide higher level storage services
US20020188711A1 (en) * 2001-02-13 2002-12-12 Confluence Networks, Inc. Failover processing in a storage system
US7039827B2 (en) * 2001-02-13 2006-05-02 Network Appliance, Inc. Failover processing in a storage system
US7640451B2 (en) * 2001-02-13 2009-12-29 Netapp, Inc. Failover processing in a storage system
US7065616B2 (en) 2001-02-13 2006-06-20 Network Appliance, Inc. System and method for policy based storage provisioning and management
US20050027754A1 (en) * 2001-02-13 2005-02-03 Candera, Inc. System and method for policy based storage provisioning and management
US7203730B1 (en) 2001-02-13 2007-04-10 Network Appliance, Inc. Method and apparatus for identifying storage devices
US20060117212A1 (en) * 2001-02-13 2006-06-01 Network Appliance, Inc. Failover processing in a storage system
US20020124201A1 (en) * 2001-03-01 2002-09-05 International Business Machines Corporation Method and system for log repair action handling on a logically partitioned multiprocessing system
US20020133601A1 (en) * 2001-03-16 2002-09-19 Kennamer Walter J. Failover of servers over which data is partitioned
US20020188718A1 (en) * 2001-05-04 2002-12-12 Rlx Technologies, Inc. Console information storage system and method
US20020188709A1 (en) * 2001-05-04 2002-12-12 Rlx Technologies, Inc. Console information server system and method
US20030028819A1 (en) * 2001-05-07 2003-02-06 International Business Machines Corporation Method and apparatus for a global cache directory in a storage cluster
US6996674B2 (en) * 2001-05-07 2006-02-07 International Business Machines Corporation Method and apparatus for a global cache directory in a storage cluster
US20020170004A1 (en) * 2001-05-08 2002-11-14 Shugart Technology, Inc. Storage area network monitor device and networked monitor system
US7209968B1 (en) * 2001-05-29 2007-04-24 Agilent Technologies, Inc. System and method for recovering management of network element(s) responsive to failure of a distributed gateway
US7702791B2 (en) 2001-07-16 2010-04-20 Bea Systems, Inc. Hardware load-balancing apparatus for session replication
US7571215B2 (en) 2001-07-16 2009-08-04 Bea Systems, Inc. Data replication protocol
US20030014526A1 (en) * 2001-07-16 2003-01-16 Sam Pullara Hardware load-balancing apparatus for session replication
US20030018732A1 (en) * 2001-07-16 2003-01-23 Jacobs Dean Bernard Data replication protocol
US7409420B2 (en) 2001-07-16 2008-08-05 Bea Systems, Inc. Method and apparatus for session replication and failover
US20030023898A1 (en) * 2001-07-16 2003-01-30 Jacobs Dean Bernard Layered architecture for data replication
US20030014480A1 (en) * 2001-07-16 2003-01-16 Sam Pullara Method and apparatus for session replication and failover
US6944785B2 (en) * 2001-07-23 2005-09-13 Network Appliance, Inc. High-availability cluster virtual server system
US20030018927A1 (en) * 2001-07-23 2003-01-23 Gadir Omar M.A. High-availability cluster virtual server system
US7243374B2 (en) 2001-08-08 2007-07-10 Microsoft Corporation Rapid application security threat analysis
US7139930B2 (en) 2001-08-09 2006-11-21 Dell Products L.P. Failover system and method for cluster environment
US20050268156A1 (en) * 2001-08-09 2005-12-01 Dell Products L.P. Failover system and method for cluster environment
US7444333B2 (en) 2001-08-30 2008-10-28 Bea Systems, Inc. Cluster caching with concurrency checking
US20030046230A1 (en) * 2001-08-30 2003-03-06 Jacobs Dean Bernard Method for maintaining account consistency
US8176014B2 (en) 2001-08-30 2012-05-08 Oracle International Corporation System and method for providing a cache that stores entity beans and employs data invalidation
US20060123066A1 (en) * 2001-08-30 2006-06-08 Bea Systems, Inc. Cluster caching with concurrency checking
US20070192320A1 (en) * 2001-08-30 2007-08-16 Bea Systems, Inc. System and Method for Flushing Bean Cache
US20030051021A1 (en) * 2001-09-05 2003-03-13 Hirschfeld Robert A. Virtualized logical server cloud
US6880002B2 (en) * 2001-09-05 2005-04-12 Surgient, Inc. Virtualized logical server cloud providing non-deterministic allocation of logical attributes of logical servers to physical resources
US7921169B2 (en) 2001-09-06 2011-04-05 Oracle International Corporation System and method for exactly once message store communication
US7257629B2 (en) * 2001-09-27 2007-08-14 Siemens Communications, Inc. Method and apparatus for providing back-up capability in a communication system
US20030061319A1 (en) * 2001-09-27 2003-03-27 Manzardo Marcel B. Method and apparatus for providing back-up capability in a communication system
US20030069953A1 (en) * 2001-09-28 2003-04-10 Bottom David A. Modular server architecture with high-availability management capability
US7162658B2 (en) 2001-10-12 2007-01-09 Dell Products L.P. System and method for providing automatic data restoration after a storage device failure
US20050193238A1 (en) * 2001-10-12 2005-09-01 Dell Products L.P. System and method for providing automatic data restoration after a storage device failure
US20030084100A1 (en) * 2001-11-01 2003-05-01 Gahan Richard A. Server monitoring and failover mechanism
US7065670B2 (en) * 2001-11-01 2006-06-20 3Com Corporation Server monitoring and failover mechanism
US6976187B2 (en) * 2001-11-08 2005-12-13 Broadcom Corporation Rebuilding redundant disk arrays using distributed hot spare space
US20030088803A1 (en) * 2001-11-08 2003-05-08 Raidcore, Inc. Rebuilding redundant disk arrays using distributed hot spare space
US6934880B2 (en) * 2001-11-21 2005-08-23 Exanet, Inc. Functional fail-over apparatus and method of operation thereof
US20030097610A1 (en) * 2001-11-21 2003-05-22 Exanet, Inc. Functional fail-over apparatus and method of operation thereof
US7539127B1 (en) * 2001-12-13 2009-05-26 Cisco Technology, Inc. System and method for recovering from endpoint failure in a communication session
US20030126240A1 (en) * 2001-12-14 2003-07-03 Frank Vosseler Method, system and computer program product for monitoring objects in an it network
US7328322B2 (en) 2002-01-18 2008-02-05 Bea Systems, Inc. System and method for optimistic caching
US20060123199A1 (en) * 2002-01-18 2006-06-08 Bea Systems, Inc. System and method for optimistic caching
US7467166B2 (en) 2002-01-18 2008-12-16 Bea Systems, Inc. System and method for heterogeneous caching
US20060004959A1 (en) * 2002-01-18 2006-01-05 Bea Systems, Inc. System and method for heterogeneous caching
US20080097997A1 (en) * 2002-01-18 2008-04-24 Bea Systems, Inc. System and method for optimistic caching
US20070192334A1 (en) * 2002-01-18 2007-08-16 Bea Systems, Inc. System and Method for Heterogeneous Caching
US7392317B2 (en) 2002-02-21 2008-06-24 Bea Systems, Inc. Systems and methods for migratable services
US7403996B2 (en) 2002-02-21 2008-07-22 Bea Systems, Inc. Systems and methods for migratable services
US20030163761A1 (en) * 2002-02-21 2003-08-28 Michael Chen System and method for message driven bean service migration
US20070153691A1 (en) * 2002-02-21 2007-07-05 Bea Systems, Inc. Systems and methods for automated service migration
US20070147306A1 (en) * 2002-02-21 2007-06-28 Bea Systems, Inc. Systems and methods for migratable services
US20070226323A1 (en) * 2002-02-21 2007-09-27 Bea Systems, Inc. Systems and methods for migratable services
US7694003B2 (en) 2002-02-21 2010-04-06 Bea Systems, Inc. Systems and methods for migratable services
US7392302B2 (en) * 2002-02-21 2008-06-24 Bea Systems, Inc. Systems and methods for automated service migration
US20030182427A1 (en) * 2002-02-21 2003-09-25 Halpern Eric M. Systems and methods for automated service migration
US20070136393A1 (en) * 2002-02-22 2007-06-14 Bea Systems, Inc. System for Highly Available Transaction Recovery for Transaction Processing Systems
US7620842B2 (en) 2002-02-22 2009-11-17 Bea Systems, Inc. Method for highly available transaction recovery for transaction processing systems
US20060271814A1 (en) * 2002-02-22 2006-11-30 Bea Systems, Inc. Method for highly available transaction recovery for transaction processing systems
US7380155B2 (en) 2002-02-22 2008-05-27 Bea Systems, Inc. System for highly available transaction recovery for transaction processing systems
US20060129872A1 (en) * 2002-02-22 2006-06-15 Fung Priscilla C Apparatus for highly available transaction recovery for transaction processing systems
US7406618B2 (en) 2002-02-22 2008-07-29 Bea Systems, Inc. Apparatus for highly available transaction recovery for transaction processing systems
US20050192993A1 (en) * 2002-05-23 2005-09-01 Bea Systems, Inc. System and method for performing commutative operations in data access systems
US20080091683A1 (en) * 2002-05-23 2008-04-17 Bea Systems, Inc. System and method for performing commutative operations in data access systems
US7895153B2 (en) 2002-05-23 2011-02-22 Oracle International Corporation System and method for performing commutative operations in data access systems
US20040010583A1 (en) * 2002-07-10 2004-01-15 Nortel Networks Limited Method and apparatus for defining failover events in a network device
US7516202B2 (en) * 2002-07-10 2009-04-07 Nortel Networks Limited Method and apparatus for defining failover events in a network device
US20040010584A1 (en) * 2002-07-15 2004-01-15 Peterson Alec H. System and method for monitoring state information in a network
US20050160335A1 (en) * 2002-07-15 2005-07-21 Peterson Alec H. System and method for monitoring state information in a network
US20040059850A1 (en) * 2002-09-19 2004-03-25 Hipp Christopher G. Modular server processing card system and method
US7246255B1 (en) * 2003-01-17 2007-07-17 Unisys Corporation Method for shortening the resynchronization time following failure in a computer system utilizing separate servers for redundancy
US7043580B1 (en) * 2003-01-17 2006-05-09 Unisys Corporation Cluster lock server: ability to support multiple standard and proprietary locking protocols
US7149923B1 (en) * 2003-01-17 2006-12-12 Unisys Corporation Software control using the controller as a component to achieve resiliency in a computer system utilizing separate servers for redundancy
US7155638B1 (en) * 2003-01-17 2006-12-26 Unisys Corporation Clustered computer system utilizing separate servers for redundancy in which the host computers are unaware of the usage of separate servers
US7630877B2 (en) 2003-03-06 2009-12-08 Microsoft Corporation Architecture for distributed computing system and automated design, deployment, and management of distributed applications
US7792931B2 (en) 2003-03-06 2010-09-07 Microsoft Corporation Model-based system provisioning
US7684964B2 (en) 2003-03-06 2010-03-23 Microsoft Corporation Model and system state synchronization
US7890543B2 (en) 2003-03-06 2011-02-15 Microsoft Corporation Architecture for distributed computing system and automated design, deployment, and management of distributed applications
US8122106B2 (en) 2003-03-06 2012-02-21 Microsoft Corporation Integrating design, deployment, and management phases for systems
US7890951B2 (en) 2003-03-06 2011-02-15 Microsoft Corporation Model-based provisioning of test environments
US7689676B2 (en) 2003-03-06 2010-03-30 Microsoft Corporation Model-based policy application
US7886041B2 (en) 2003-03-06 2011-02-08 Microsoft Corporation Design time validation of systems
US8185777B2 (en) 2003-04-23 2012-05-22 Dot Hill Systems Corporation Network storage appliance with integrated server and redundant storage controllers
US7627780B2 (en) 2003-04-23 2009-12-01 Dot Hill Systems Corporation Apparatus and method for deterministically performing active-active failover of redundant servers in a network storage appliance
US7437604B2 (en) 2003-04-23 2008-10-14 Dot Hill Systems Corporation Network storage appliance with integrated redundant servers and storage controllers
US7739543B1 (en) * 2003-04-23 2010-06-15 Netapp, Inc. System and method for transport-level failover for loosely coupled iSCSI target devices
US7380163B2 (en) 2003-04-23 2008-05-27 Dot Hill Systems Corporation Apparatus and method for deterministically performing active-active failover of redundant servers in response to a heartbeat link failure
US9176835B2 (en) 2003-04-23 2015-11-03 Dot Hill Systems Corporation Network, storage appliance, and method for externalizing an external I/O link between a server and a storage controller integrated within the storage appliance chassis
US20050010715A1 (en) * 2003-04-23 2005-01-13 Dot Hill Systems Corporation Network storage appliance with integrated server and redundant storage controllers
US20050010709A1 (en) * 2003-04-23 2005-01-13 Dot Hill Systems Corporation Application server blade for embedded storage appliance
US20050021605A1 (en) * 2003-04-23 2005-01-27 Dot Hill Systems Corporation Apparatus and method for storage controller to deterministically kill one of redundant servers integrated within the storage controller chassis
US20050102549A1 (en) * 2003-04-23 2005-05-12 Dot Hill Systems Corporation Network storage appliance with an integrated switch
US20100064169A1 (en) * 2003-04-23 2010-03-11 Dot Hill Systems Corporation Network storage appliance with integrated server and redundant storage controllers
US7676600B2 (en) 2003-04-23 2010-03-09 Dot Hill Systems Corporation Network, storage appliance, and method for externalizing an internal I/O link between a server and a storage controller integrated within the storage appliance chassis
US20100049822A1 (en) * 2003-04-23 2010-02-25 Dot Hill Systems Corporation Network, storage appliance, and method for externalizing an external I/O link between a server and a storage controller integrated within the storage appliance chassis
US7661014B2 (en) 2003-04-23 2010-02-09 Dot Hill Systems Corporation Network storage appliance with integrated server and redundant storage controllers
US7320083B2 (en) 2003-04-23 2008-01-15 Dot Hill Systems Corporation Apparatus and method for storage controller to deterministically kill one of redundant servers integrated within the storage controller chassis
US7401254B2 (en) * 2003-04-23 2008-07-15 Dot Hill Systems Corporation Apparatus and method for a server deterministically killing a redundant server integrated within the same network storage appliance chassis
US20070100933A1 (en) * 2003-04-23 2007-05-03 Dot Hill Systems Corporation Application server blade for embedded storage appliance
US7330999B2 (en) 2003-04-23 2008-02-12 Dot Hill Systems Corporation Network storage appliance with integrated redundant servers and storage controllers
US7334064B2 (en) 2003-04-23 2008-02-19 Dot Hill Systems Corporation Application server blade for embedded storage appliance
US7565566B2 (en) 2003-04-23 2009-07-21 Dot Hill Systems Corporation Network storage appliance with an integrated switch
US7464205B2 (en) 2003-04-23 2008-12-09 Dot Hill Systems Corporation Application server blade for embedded storage appliance
US20050207105A1 (en) * 2003-04-23 2005-09-22 Dot Hill Systems Corporation Apparatus and method for deterministically performing active-active failover of redundant servers in a network storage appliance
US7464214B2 (en) 2003-04-23 2008-12-09 Dot Hill Systems Corporation Application server blade for embedded storage appliance
US20050246568A1 (en) * 2003-04-23 2005-11-03 Dot Hill Systems Corporation Apparatus and method for deterministically killing one of redundant servers integrated within a network storage appliance chassis
US7478230B2 (en) * 2003-05-09 2009-01-13 Kabushiki Kaisha Toshiba Computer system and failed computer replacing method to the same system
US20070067613A1 (en) * 2003-05-09 2007-03-22 Kenichi Mizoguchi Computer system and failed computer replacing method to the same system
US7546366B2 (en) 2003-05-27 2009-06-09 Nokia Corporation Data collection in a computer cluster
WO2004107196A1 (en) * 2003-05-27 2004-12-09 Nokia Corporation Data collection in a computer cluster
US20040243702A1 (en) * 2003-05-27 2004-12-02 Vainio Jukka A. Data collection in a computer cluster
US7613822B2 (en) 2003-06-30 2009-11-03 Microsoft Corporation Network load balancing with session information
US7567504B2 (en) 2003-06-30 2009-07-28 Microsoft Corporation Network load balancing with traffic routing
US7590736B2 (en) 2003-06-30 2009-09-15 Microsoft Corporation Flexible network load balancing
US7636917B2 (en) 2003-06-30 2009-12-22 Microsoft Corporation Network load balancing with host status information
US7606929B2 (en) 2003-06-30 2009-10-20 Microsoft Corporation Network load balancing with connection manipulation
US20050036483A1 (en) * 2003-08-11 2005-02-17 Minoru Tomisaka Method and system for managing programs for web service system
US20050071596A1 (en) * 2003-09-26 2005-03-31 International Business Machines Corporation Method, apparatus and program storage device for providing automatic performance optimization of virtualized storage allocation within a network of storage elements
US8331391B2 (en) 2003-09-26 2012-12-11 Quest Software, Inc. Network abstraction and isolation layer for masquerading machine identity of a computer
US20100281181A1 (en) * 2003-09-26 2010-11-04 Surgient, Inc. Network abstraction and isolation layer for masquerading machine identity of a computer
US20050108187A1 (en) * 2003-11-05 2005-05-19 Hitachi, Ltd. Apparatus and method of heartbeat mechanism using remote mirroring link for multiple storage system
US7383313B2 (en) * 2003-11-05 2008-06-03 Hitachi, Ltd. Apparatus and method of heartbeat mechanism using remote mirroring link for multiple storage system
US20050102559A1 (en) * 2003-11-10 2005-05-12 Nokia Corporation Computer cluster, computer unit and method to control storage access between computer units
WO2005045675A1 (en) * 2003-11-10 2005-05-19 Nokia Corporation Computer cluster, computer unit and method to control storage access between computer units
US7441144B2 (en) 2003-11-10 2008-10-21 Nokia Corporation Computer cluster, computer unit and method to control storage access between computer units
US20050108593A1 (en) * 2003-11-14 2005-05-19 Dell Products L.P. Cluster failover from physical node to virtual node
US20050125557A1 (en) * 2003-12-08 2005-06-09 Dell Products L.P. Transaction transfer during a failover of a cluster controller
US20050144268A1 (en) * 2003-12-08 2005-06-30 Mohammad El-Batal Managing spare devices on a finite network
US7730489B1 (en) * 2003-12-10 2010-06-01 Oracle America, Inc. Horizontally scalable and reliable distributed transaction management in a clustered application server environment
US20050132379A1 (en) * 2003-12-11 2005-06-16 Dell Products L.P. Method, system and software for allocating information handling system resources in response to high availability cluster fail-over events
US8316110B1 (en) * 2003-12-18 2012-11-20 Symantec Operating Corporation System and method for clustering standalone server applications and extending cluster functionality
US20050149684A1 (en) * 2003-12-30 2005-07-07 Dell Products L.P. Distributed failover aware storage area network backup of application data in an active-N high availability cluster
US7234075B2 (en) 2003-12-30 2007-06-19 Dell Products L.P. Distributed failover aware storage area network backup of application data in an active-N high availability cluster
US8078718B1 (en) * 2004-01-07 2011-12-13 Network Appliance, Inc. Method and apparatus for testing a storage system head in a clustered failover configuration
US20050177779A1 (en) * 2004-01-23 2005-08-11 Pomaranski Ken G. Cluster node status detection and communication
US7228460B2 (en) 2004-01-23 2007-06-05 Hewlett-Packard Development Company, L.P. Multi-state status reporting for high-availability cluster nodes
US20050188283A1 (en) * 2004-01-23 2005-08-25 Pomaranski Ken G. Node management in high-availability cluster
US20050188265A1 (en) * 2004-01-23 2005-08-25 Pomaranski Ken G. Multi-state status reporting for high-availability cluster nodes
US6928589B1 (en) * 2004-01-23 2005-08-09 Hewlett-Packard Development Company, L.P. Node management in high-availability cluster
US7228462B2 (en) 2004-01-23 2007-06-05 Hewlett-Packard Development Company, L.P. Cluster node status detection and communication
US20050193245A1 (en) * 2004-02-04 2005-09-01 Hayden John M. Internet protocol based disaster recovery of a server
US7383463B2 (en) * 2004-02-04 2008-06-03 Emc Corporation Internet protocol based disaster recovery of a server
US7778422B2 (en) 2004-02-27 2010-08-17 Microsoft Corporation Security associations for devices
US7565568B1 (en) * 2004-02-27 2009-07-21 Veritas Operating Corporation Method and system for virtualization switch failover
US8539076B2 (en) 2004-03-19 2013-09-17 Hitachi, Ltd. Inter-server dynamic transfer method for virtual file servers
US7200622B2 (en) 2004-03-19 2007-04-03 Hitachi, Ltd. Inter-server dynamic transfer method for virtual file servers
US7296041B2 (en) 2004-03-19 2007-11-13 Hitachi, Ltd. Inter-server dynamic transfer method for virtual file servers
US7890798B1 (en) 2004-03-22 2011-02-15 Hewlett-Packard Development Company, L.P. Computer cluster with second-node instance of application having access to state snapshot of first-node instance of application
US7814491B1 (en) * 2004-04-14 2010-10-12 Oracle America, Inc. Method and apparatus for managing system resources using a container model
US7669235B2 (en) 2004-04-30 2010-02-23 Microsoft Corporation Secure domain join for computing devices
US7313735B1 (en) * 2004-04-30 2007-12-25 Sun Microsystems, Inc. In-line server health checking
US20050267920A1 (en) * 2004-05-13 2005-12-01 Fabrice Helliker System and method for archiving data in a clustered environment
US7660824B2 (en) 2004-05-20 2010-02-09 Bea Systems, Inc. System and method for performing batch configuration changes
US20050262101A1 (en) * 2004-05-20 2005-11-24 Bea Systems, Inc. System and method for performing batch configuration changes
US7577959B2 (en) * 2004-06-24 2009-08-18 International Business Machines Corporation Providing on-demand capabilities using virtual machines and clustering processes
US20050289540A1 (en) * 2004-06-24 2005-12-29 Lu Nguyen Providing on-demand capabilities using virtual machines and clustering processes
WO2006019744A2 (en) * 2004-07-16 2006-02-23 Dot Hill Systems Corporation Deterministically active-active failover of redundant servers in a network storage appliance
WO2006019744A3 (en) * 2004-07-16 2006-09-14 Dot Hill Systems Corp Deterministically active-active failover of redundant servers in a network storage appliance
US20060036903A1 (en) * 2004-08-11 2006-02-16 Dubal Kamlesh I Managing access to spare data storage devices
US7308600B2 (en) 2004-08-11 2007-12-11 International Business Machines Corporation Managing access to spare data storage devices
US20060048017A1 (en) * 2004-08-30 2006-03-02 International Business Machines Corporation Techniques for health monitoring and control of application servers
US8627149B2 (en) * 2004-08-30 2014-01-07 International Business Machines Corporation Techniques for health monitoring and control of application servers
US7409576B2 (en) * 2004-09-08 2008-08-05 Hewlett-Packard Development Company, L.P. High-availability cluster with proactive maintenance
US7428655B2 (en) 2004-09-08 2008-09-23 Hewlett-Packard Development Company, L.P. Smart card for high-availability clustering
US20060053336A1 (en) * 2004-09-08 2006-03-09 Pomaranski Ken G High-availability cluster node removal and communication
US20060053330A1 (en) * 2004-09-08 2006-03-09 Pomaranski Ken G Smart card for high-availability clustering
US20060053337A1 (en) * 2004-09-08 2006-03-09 Pomaranski Ken G High-availability cluster with proactive maintenance
US7664994B2 (en) * 2004-09-08 2010-02-16 Hewlett-Packard Development Company, L.P. High-availability cluster node removal and communication
CN1299203C (en) * 2004-09-14 2007-02-07 中国人民解放军上海警备区司令部指挥自动化工作站 Data disaster tocerance backup control system
US8185776B1 (en) * 2004-09-30 2012-05-22 Symantec Operating Corporation System and method for monitoring an application or service group within a cluster as a resource of another cluster
US8464092B1 (en) * 2004-09-30 2013-06-11 Symantec Operating Corporation System and method for monitoring an application or service group within a cluster as a resource of another cluster
EP1816564A4 (en) * 2004-10-12 2009-03-18 Fujitsu Ltd RESOURCE EXCHANGE PROCESSING PROGRAM AND RESOURCE EXCHANGE PROCESSING METHOD
EP1816564A1 (en) * 2004-10-12 2007-08-08 Fujitsu Ltd. Resource exchange processing program and resource exchange processing method
US20070237162A1 (en) * 2004-10-12 2007-10-11 Fujitsu Limited Method, apparatus, and computer product for processing resource change
US7478380B2 (en) 2004-11-15 2009-01-13 Dell Products L.P. Dynamically updatable and easily scalable command line parser using a centralized data schema
US20060129980A1 (en) * 2004-11-15 2006-06-15 David Schmidt Dynamically updatable and easily scalable command line parser using a centralized data schema
US20070294493A1 (en) * 2004-11-24 2007-12-20 International Business Machines Corporation Automatically managing the state of replicated data of a computing environment, and methods therefor
US7680994B2 (en) 2004-11-24 2010-03-16 International Business Machines Corporation Automatically managing the state of replicated data of a computing environment, and methods therefor
US7475204B2 (en) 2004-11-24 2009-01-06 International Business Machines Corporation Automatically managing the state of replicated data of a computing environment
US20060112244A1 (en) * 2004-11-24 2006-05-25 International Business Machines Corporation Automatically managing the state of replicated data of a computing environment
US20060129759A1 (en) * 2004-11-30 2006-06-15 International Business Machines Corporation Method and system for error strategy in a storage system
US20060129666A1 (en) * 2004-12-09 2006-06-15 International Business Machines Corporation Selective device reset method for device sharing with fail-over
US7711978B1 (en) 2004-12-30 2010-05-04 Symantec Operating Corporation Proactive utilization of fabric events in a network virtualization environment
US20060161753A1 (en) * 2005-01-18 2006-07-20 Aschoff John G Method, apparatus and program storage device for providing automatic performance optimization of virtualized storage allocation within a virtualized storage subsystem
CN100463411C (en) * 2005-01-27 2009-02-18 国际商业机器公司 Controlling service failover in clustered storage apparatus networks and opration method thereof
US7506009B2 (en) 2005-01-28 2009-03-17 Dell Products Lp Systems and methods for accessing a shared storage network using multiple system nodes configured as server nodes
US20060173851A1 (en) * 2005-01-28 2006-08-03 Singh Sumankumar A Systems and methods for accessing data
US8489728B2 (en) 2005-04-15 2013-07-16 Microsoft Corporation Model-based system monitoring
US7797147B2 (en) 2005-04-15 2010-09-14 Microsoft Corporation Model-based system monitoring
US7802144B2 (en) 2005-04-15 2010-09-21 Microsoft Corporation Model-based system monitoring
US8549513B2 (en) 2005-06-29 2013-10-01 Microsoft Corporation Model-based virtual system provisioning
US10540159B2 (en) 2005-06-29 2020-01-21 Microsoft Technology Licensing, Llc Model-based virtual system provisioning
US9811368B2 (en) 2005-06-29 2017-11-07 Microsoft Technology Licensing, Llc Model-based virtual system provisioning
US9317270B2 (en) 2005-06-29 2016-04-19 Microsoft Technology Licensing, Llc Model-based virtual system provisioning
US7480816B1 (en) 2005-08-04 2009-01-20 Sun Microsystems, Inc. Failure chain detection and recovery in a group of cooperating systems
CN100378678C (en) * 2005-08-10 2008-04-02 英业达股份有限公司 Backup regression management and control method and system for cluster computer equipment
US7821930B2 (en) * 2005-09-12 2010-10-26 Microsoft Corporation Fault-tolerant communications in routed networks
US8169894B2 (en) 2005-09-12 2012-05-01 Microsoft Corporation Fault-tolerant communications in routed networks
US9253293B2 (en) 2005-09-12 2016-02-02 Microsoft Technology Licensing, Llc Fault-tolerant communications in routed networks
US8958325B2 (en) 2005-09-12 2015-02-17 Microsoft Corporation Fault-tolerant communications in routed networks
US20110004782A1 (en) * 2005-09-12 2011-01-06 Microsoft Corporation Fault-tolerant communications in routed networks
US8369208B2 (en) 2005-09-12 2013-02-05 Microsoft Corporation Fault-tolerant communications in routed networks
US20110004783A1 (en) * 2005-09-12 2011-01-06 Microsoft Corporation Fault-tolerant communications in routed networks
US20070058528A1 (en) * 2005-09-12 2007-03-15 Microsoft Corporation Fault-Tolerant Communications In Routed Networks
US7941309B2 (en) 2005-11-02 2011-05-10 Microsoft Corporation Modeling IT operations/policies
US8352778B2 (en) 2005-11-29 2013-01-08 Hitachi, Ltd. Failure recovery method
US7634681B2 (en) * 2005-11-29 2009-12-15 Hitachi, Ltd. Failure recovery method
US7934119B2 (en) 2005-11-29 2011-04-26 Hitachi, Ltd. Failure recovery method
US20100050011A1 (en) * 2005-11-29 2010-02-25 Yoshifumi Takamoto Failure recovery method
US8694820B2 (en) 2005-11-29 2014-04-08 Hitachi, Ltd. Failure recovery method
US20070174658A1 (en) * 2005-11-29 2007-07-26 Yoshifumi Takamoto Failure recovery method
US20110173491A1 (en) * 2005-11-29 2011-07-14 Yoshifumi Takamoto Failure recovery method
US7793138B2 (en) * 2005-12-21 2010-09-07 Cisco Technology, Inc. Anomaly detection for storage traffic in a data center
US20070143552A1 (en) * 2005-12-21 2007-06-21 Cisco Technology, Inc. Anomaly detection for storage traffic in a data center
US20070220135A1 (en) * 2006-03-16 2007-09-20 Honeywell International Inc. System and method for computer service security
US7461289B2 (en) * 2006-03-16 2008-12-02 Honeywell International Inc. System and method for computer service security
US8078728B1 (en) 2006-03-31 2011-12-13 Quest Software, Inc. Capacity pooling for application reservation and delivery
US7539755B2 (en) * 2006-04-24 2009-05-26 Inventec Corporation Real-time heartbeat frequency regulation system and method utilizing user-requested frequency
US20070250619A1 (en) * 2006-04-24 2007-10-25 Inventec Corporation Real-time heartbeat frequency regulation system and method utilizing user-requested frequency
US20070250594A1 (en) * 2006-04-25 2007-10-25 Nec Corporation File sharing method and file sharing system
US8250176B2 (en) * 2006-04-25 2012-08-21 Nec Corporation File sharing method and file sharing system
US20080016387A1 (en) * 2006-06-29 2008-01-17 Dssdr, Llc Data transfer and recovery process
US8001414B2 (en) 2006-06-29 2011-08-16 Dssdr, Llc Data transfer and recovery system
US20110214013A1 (en) * 2006-06-29 2011-09-01 Dssdr, Llc Data Transfer and Recovery Process
US9015520B2 (en) 2006-06-29 2015-04-21 Dssdr, Llc Data transfer and recovery
US7487383B2 (en) 2006-06-29 2009-02-03 Dssdr, Llc Data transfer and recovery process
US8176358B2 (en) 2006-06-29 2012-05-08 Dssdr, Llc Data transfer and recovery process
US8639966B2 (en) 2006-06-29 2014-01-28 Dssdr, Llc Data transfer and recovery process
US9176823B2 (en) 2006-06-29 2015-11-03 Dssdr, Llc Data transfer and recovery process
US8990613B2 (en) 2006-06-29 2015-03-24 Dssdr, Llc Data transfer and recovery
US10019324B2 (en) 2006-06-29 2018-07-10 Efolder Inc. Data transfer and recovery
US9471442B2 (en) 2006-06-29 2016-10-18 Dssdr, Llc Data transfer and recovery
US7478177B2 (en) 2006-07-28 2009-01-13 Dell Products L.P. System and method for automatic reassignment of shared storage on blade replacement
US20080126829A1 (en) * 2006-08-26 2008-05-29 International Business Machines Corporation Simulation of failure recovery within clustered systems
US7770063B2 (en) 2006-08-26 2010-08-03 International Business Machines Corporation Simulation of failure recovery within clustered systems
US20080077635A1 (en) * 2006-09-22 2008-03-27 Digital Bazaar, Inc. Highly Available Clustered Storage Network
US8032780B2 (en) * 2006-12-04 2011-10-04 Electronics And Telecommunications Research Institute Virtualization based high availability cluster system and method for managing failure in virtualization based high availability cluster system
US20100077250A1 (en) * 2006-12-04 2010-03-25 Electronics And Telecommunications Research Instit Ute Virtualization based high availability cluster system and method for managing failure in virtualization based high availability cluster system
US20080209136A1 (en) * 2007-02-28 2008-08-28 Yanling Qi System and method of storage system assisted i/o fencing for shared storage configuration
US7757116B2 (en) 2007-04-04 2010-07-13 Vision Solutions, Inc. Method and system for coordinated multiple cluster failover
US8429450B2 (en) 2007-04-04 2013-04-23 Vision Solutions, Inc. Method and system for coordinated multiple cluster failover
US20100241896A1 (en) * 2007-04-04 2010-09-23 Brown David E Method and System for Coordinated Multiple Cluster Failover
US20080250267A1 (en) * 2007-04-04 2008-10-09 Brown David E Method and system for coordinated multiple cluster failover
US20080263255A1 (en) * 2007-04-20 2008-10-23 International Business Machines Corporation Apparatus, System, and Method For Adapter Card Failover
US7870417B2 (en) 2007-04-20 2011-01-11 International Business Machines Corporation Apparatus, system, and method for adapter card failover
US20080263391A1 (en) * 2007-04-20 2008-10-23 International Business Machines Corporation Apparatus, System, and Method For Adapter Card Failover
US8201016B2 (en) * 2007-06-28 2012-06-12 Alcatel Lucent Heartbeat distribution that facilitates recovery in the event of a server failure during a user dialog
US20090006885A1 (en) * 2007-06-28 2009-01-01 Pattabhiraman Ramesh V Heartbeat distribution that facilitates recovery in the event of a server failure during a user dialog
US20090016251A1 (en) * 2007-07-13 2009-01-15 Gainspan, Inc. Management method and system of low power consuming devices
WO2009011734A1 (en) * 2007-07-13 2009-01-22 Gainspan, Inc. Management method and system of low power consuming devices
US20100205474A1 (en) * 2007-09-03 2010-08-12 Abb Research Ltd Redundant, distributed computer system having server functionalities
WO2009030363A1 (en) * 2007-09-03 2009-03-12 Abb Research Ltd. Redundant, distributed computer system having server functionalities
US9167452B2 (en) * 2007-12-17 2015-10-20 Optis Wireless Technology, Llc Signalling proxy system for a switching center server, wherein an indication of operation in an active state is transmitted from a signaling proxy via at least one processing blade to the remaining signaling proxies
US20110060824A1 (en) * 2007-12-17 2011-03-10 Johan Lundstrom Signalling Proxy System for a Switching Center Server
US8194674B1 (en) 2007-12-20 2012-06-05 Quest Software, Inc. System and method for aggregating communications and for translating between overlapping internal network addresses and unique external network addresses
US10853206B1 (en) * 2008-04-03 2020-12-01 United Services Automobile Association Systems and methods for enabling failover support with multiple backup data storage structures
US20090265510A1 (en) * 2008-04-17 2009-10-22 Dell Products L.P. Systems and Methods for Distributing Hot Spare Disks In Storage Arrays
US20090276612A1 (en) * 2008-04-30 2009-11-05 International Business Machines Corporation Implementation of sparing policies for servers
US8161315B2 (en) * 2008-04-30 2012-04-17 International Business Machines Corporation Implementation of sparing policies for servers
US8244998B1 (en) * 2008-12-11 2012-08-14 Symantec Corporation Optimized backup for a clustered storage system
US8271772B2 (en) * 2009-01-23 2012-09-18 Hitachi, Ltd. Boot control method of computer system
JP2010170351A (en) * 2009-01-23 2010-08-05 Hitachi Ltd Boot control method of computer system
US20100191948A1 (en) * 2009-01-23 2010-07-29 Hitachi, Ltd. Boot control method of computer system
US20100217792A1 (en) * 2009-02-24 2010-08-26 Yu Wang Method and apparatus for distributed backup of computer data
US8219672B2 (en) * 2009-02-24 2012-07-10 Yu Wang Method and apparatus for distributed backup of computer data
US20120072604A1 (en) * 2009-05-29 2012-03-22 France Telecom technique for delivering content to a user
US20110055891A1 (en) * 2009-08-26 2011-03-03 Rice Christopher T Device security
US8707082B1 (en) * 2009-10-29 2014-04-22 Symantec Corporation Method and system for enhanced granularity in fencing operations
US9378258B2 (en) * 2009-11-25 2016-06-28 Netapp, Inc. Method and system for transparently replacing nodes of a clustered storage system
US20150046745A1 (en) * 2009-11-25 2015-02-12 Netapp, Inc. Method and system for transparently replacing nodes of a clustered storage system
US9009710B2 (en) * 2009-12-07 2015-04-14 Zte Corporation Detecting deadlocked file transfer protocol upload connections and performing session self-recovery using information stored in a FIFO resource array
US20120240119A1 (en) * 2009-12-07 2012-09-20 Zte Corporation Method and device for file transfer protocol deadlock detection and self recovery
US11222298B2 (en) 2010-05-28 2022-01-11 Daniel H. Abelow User-controlled digital environment across devices, places, and times with continuous, variable digital boundaries
US9183560B2 (en) 2010-05-28 2015-11-10 Daniel H. Abelow Reality alternate
US8402230B2 (en) 2010-09-10 2013-03-19 International Business Machines Corporation Recoverability while adding storage to a redirect-on-write storage pool
US9600315B2 (en) * 2010-10-22 2017-03-21 Netapp, Inc. Seamless takeover of a stateful protocol session in a virtual machine environment
US20120102135A1 (en) * 2010-10-22 2012-04-26 Netapp, Inc. Seamless takeover of a stateful protocol session in a virtual machine environment
US8621260B1 (en) 2010-10-29 2013-12-31 Symantec Corporation Site-level sub-cluster dependencies
US8775867B2 (en) 2011-03-31 2014-07-08 International Business Machines Corporation Method and system for using a standby server to improve redundancy in a dual-node data storage system
US8782464B2 (en) 2011-03-31 2014-07-15 International Business Machines Corporation Method and system for using a standby server to improve redundancy in a dual-node data storage system
US9509842B2 (en) 2011-06-17 2016-11-29 Airbus Ds Communications, Inc. Collaborative and distributed emergency multimedia data management
US9137383B2 (en) 2011-06-17 2015-09-15 Airbus Ds Communications, Inc. Systems, apparatus, and methods for collaborative and distributed emergency multimedia data management
US8868970B2 (en) * 2011-09-08 2014-10-21 Infinidat Ltd. Object based storage system and method of operating thereof
US20130067269A1 (en) * 2011-09-08 2013-03-14 Infinidat Ltd. Object based storage system and method of operating thereof
US20180329760A1 (en) * 2011-11-19 2018-11-15 International Business Machines Corporation Work Distribution and Management in High Availability Cluster Environment of Resource Adapters
US10896071B2 (en) * 2011-11-19 2021-01-19 International Business Machines Corporation Partial reading of input files to process business objects
US8725979B1 (en) * 2012-01-30 2014-05-13 Netapp, Inc. Efficient methods and systems for allocating storage volumes
US8914583B1 (en) 2012-03-31 2014-12-16 Emc Corporation System and method for improving cache performance
US8909886B1 (en) 2012-03-31 2014-12-09 Emc Corporation System and method for improving cache performance upon detecting a migration event
US8966190B1 (en) * 2012-03-31 2015-02-24 Emc Corporation System and method for assigning control of a logical unit number
US9098204B1 (en) 2012-03-31 2015-08-04 Emc Corporation System and method for improving cache performance
US20140095671A1 (en) * 2012-08-24 2014-04-03 Tencent Technology (Shenzhen) Company Limited Method and system for pushing message box
US9338246B2 (en) * 2012-08-24 2016-05-10 Tencent Technology (Shenzhen) Company Limited Method and system for pushing message box
WO2014066161A3 (en) * 2012-10-22 2014-06-19 Cassidian Communications, Inc. Clustered session management
US9801310B2 (en) 2013-04-03 2017-10-24 International Business Machines Corporation Server cooling system without the use of vapor compression refrigeration
US10701839B2 (en) 2013-04-03 2020-06-30 International Business Machines Corporation Server cooling system without the use of vapor compression refrigeration
US9280428B2 (en) 2013-04-23 2016-03-08 Neftali Ripoll Method for designing a hyper-visor cluster that does not require a shared storage device
US9680736B2 (en) 2013-09-25 2017-06-13 Airbus Ds Communications, Inc. Mixed media call routing
US9391879B2 (en) 2013-09-25 2016-07-12 Airbus Ds Communications, Inc. Mixed media call routing
US10693955B2 (en) * 2013-12-14 2020-06-23 Netapp, Inc. Techniques for SAN storage cluster synchronous disaster recovery
US20150172111A1 (en) * 2013-12-14 2015-06-18 Netapp, Inc. Techniques for san storage cluster synchronous disaster recovery
US9807233B2 (en) 2014-02-07 2017-10-31 Airbus Ds Communications, Inc. Emergency services routing proxy cluster management
US20180027115A1 (en) * 2014-02-07 2018-01-25 Airbus Ds Communications, Inc. Emergency services routing proxy cluster management
US9215329B2 (en) 2014-02-07 2015-12-15 Airbus Ds Communications, Inc. Emergency services routing proxy cluster management
US8929856B1 (en) 2014-02-07 2015-01-06 Cassidian Communications, Inc. Emergency services routing proxy cluster management
US10212282B2 (en) * 2014-02-07 2019-02-19 Vesta Solutions, Inc. Emergency services routing proxy cluster management
US10826811B1 (en) * 2014-02-11 2020-11-03 Quest Software Inc. System and method for managing clustered radio networks
US10511506B2 (en) * 2014-09-22 2019-12-17 Zte Corporation Method and device for managing virtualized network function
US20170302543A1 (en) * 2014-09-22 2017-10-19 Zte Corporation Method and Device for Managing Virtualized Network Function
CN105429776A (en) * 2014-09-22 2016-03-23 中兴通讯股份有限公司 Method and system for virtualized network function management
CN105429776B (en) * 2014-09-22 2020-06-09 中兴通讯股份有限公司 Method and system for virtualized network function management
US9948707B2 (en) 2014-10-17 2018-04-17 International Business Machines Corporation Reconnection of a client to a server in a transaction processing server cluster
US9954768B2 (en) 2014-10-17 2018-04-24 International Business Machines Corporation Reconnection of a client to a server in a transaction processing server cluster
US12143454B2 (en) 2014-11-04 2024-11-12 Comcast Cable Communications, Llc Systems and methods for data routing management
US10257290B2 (en) * 2014-11-04 2019-04-09 Comcast Cable Communications, Llc Systems and methods for data routing management
US11729278B2 (en) 2014-11-04 2023-08-15 Comcast Cable Communications, Llc Systems and methods for data routing management
US10693978B2 (en) 2014-11-04 2020-06-23 Comcast Cable Communications, Llc Systems and methods for data routing management
US20170374163A1 (en) * 2014-11-04 2017-12-28 Comcast Cable Communications, Llc Systems And Methods For Data Routing Management
US11422908B2 (en) 2014-11-13 2022-08-23 Netapp Inc. Non-disruptive controller replacement in a cross-cluster redundancy configuration
US9507678B2 (en) * 2014-11-13 2016-11-29 Netapp, Inc. Non-disruptive controller replacement in a cross-cluster redundancy configuration
US10282262B2 (en) 2014-11-13 2019-05-07 Netapp Inc. Non-disruptive controller replacement in a cross-cluster redundancy configuration
US10098258B2 (en) 2015-03-12 2018-10-09 International Business Machines Corporation Minimizing leakage in liquid cooled electronic equipment
US10085367B2 (en) 2015-03-12 2018-09-25 International Business Machines Corporation Minimizing leakage in liquid cooled electronic equipment
US9639414B1 (en) * 2015-03-25 2017-05-02 EMC IP Holding Co., LLC Remote real-time storage system monitoring and management
US10169175B2 (en) * 2015-04-30 2019-01-01 Ge Aviation Systems Llc Providing failover control on a control system
US11652686B2 (en) 2016-12-21 2023-05-16 Mastercard International Incorporated Systems and methods for dynamically commissioning and decommissioning computer components
US10594553B2 (en) 2016-12-21 2020-03-17 Mastercard International Incorporated Systems and methods for dynamically commissioning and decommissioning computer components
US10926250B2 (en) 2017-12-01 2021-02-23 Exxonmobil Chemical Patents Inc. Catalyst systems and polymerization processes for using the same
US20190229978A1 (en) * 2018-01-24 2019-07-25 Hewlett Packard Enterprise Development Lp Designation of a standby node
US10972335B2 (en) * 2018-01-24 2021-04-06 Hewlett Packard Enterprise Development Lp Designation of a standby node
CN109117317A (en) * 2018-11-01 2019-01-01 郑州云海信息技术有限公司 A kind of clustering fault restoration methods and relevant apparatus
US20230262122A1 (en) * 2020-02-25 2023-08-17 Pure Storage, Inc. Migrating Applications To A Cloud-Computing Environment
US11637896B1 (en) * 2020-02-25 2023-04-25 Pure Storage, Inc. Migrating applications to a cloud-computing environment
US11868622B2 (en) 2020-02-25 2024-01-09 Pure Storage, Inc. Application recovery across storage systems
CN112152837B (en) * 2020-08-14 2024-01-26 上海纽盾科技股份有限公司 Method, device and system for realizing intelligent supervision of network security equipment
CN112152837A (en) * 2020-08-14 2020-12-29 上海纽盾科技股份有限公司 Method, device and system for realizing intelligent supervision of network security equipment
US11539602B2 (en) * 2020-08-24 2022-12-27 T-Mobile Usa, Inc. Continuous monitoring of containers using monitor containers configured as sidecar containers
CN114296919A (en) * 2021-12-27 2022-04-08 北京天融信网络安全技术有限公司 Server online control method and device
CN116743550A (en) * 2023-08-11 2023-09-12 之江实验室 Processing method of fault storage nodes of distributed storage cluster
CN116743550B (en) * 2023-08-11 2023-12-29 之江实验室 Processing method of fault storage nodes of distributed storage cluster

Similar Documents

Publication Publication Date Title
US6609213B1 (en) Cluster-based system and method of recovery from server failures
CN1554055B (en) High availability cluster virtual server system
US7127633B1 (en) System and method to failover storage area network targets from one interface to another
US6883065B1 (en) System and method for a redundant communication channel via storage area network back-end
US7043663B1 (en) System and method to monitor and isolate faults in a storage area network
US7069468B1 (en) System and method for re-allocating storage area network resources
US7003688B1 (en) System and method for a reserved memory area shared by all redundant storage controllers
JP6317856B2 (en) Smooth controller change in redundant configuration between clusters
US8370494B1 (en) System and method for customized I/O fencing for preventing data corruption in computer system clusters
US6996741B1 (en) System and method for redundant communication between redundant controllers
US6928589B1 (en) Node management in high-availability cluster
US20030158933A1 (en) Failover clustering based on input/output processors
US6880101B2 (en) System and method for providing automatic data restoration after a storage device failure
KR100644011B1 (en) Storage domain management system
US6757753B1 (en) Uniform routing of storage access requests through redundant array controllers
US20050108593A1 (en) Cluster failover from physical node to virtual node
JP4856864B2 (en) Logical unit security for clustered storage area networks
US11226753B2 (en) Adaptive namespaces for multipath redundancy in cluster based computing systems
US20020156984A1 (en) System and method for accessing a storage area network as network attached storage
JP2004532442A (en) Failover processing in a storage system
CN101651559A (en) Failover method of storage service in double controller storage system
JP2007072571A (en) Computer system, management computer, and access path management method
JP2008517358A (en) Apparatus, system, and method for facilitating storage management
JP2018536229A (en) Method, apparatus, and medium for performing switching operation between computing nodes
CN113849136A (en) Automatic FC block storage processing method and system based on domestic platform

Legal Events

Date Code Title Description
AS Assignment

Owner name: DELL PRODUCTS, LP, TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NGUYEN, NAM;KOSACEK, MICHAEL;REEL/FRAME:011034/0155

Effective date: 20000809

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

AS Assignment

Owner name: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS FI

Free format text: PATENT SECURITY AGREEMENT (NOTES);ASSIGNORS:APPASSURE SOFTWARE, INC.;ASAP SOFTWARE EXPRESS, INC.;BOOMI, INC.;AND OTHERS;REEL/FRAME:031897/0348

Effective date: 20131029

Owner name: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT, TE

Free format text: PATENT SECURITY AGREEMENT (ABL);ASSIGNORS:DELL INC.;APPASSURE SOFTWARE, INC.;ASAP SOFTWARE EXPRESS, INC.;AND OTHERS;REEL/FRAME:031898/0001

Effective date: 20131029

Owner name: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS FIRST LIEN COLLATERAL AGENT, TEXAS

Free format text: PATENT SECURITY AGREEMENT (NOTES);ASSIGNORS:APPASSURE SOFTWARE, INC.;ASAP SOFTWARE EXPRESS, INC.;BOOMI, INC.;AND OTHERS;REEL/FRAME:031897/0348

Effective date: 20131029

Owner name: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT, TEXAS

Free format text: PATENT SECURITY AGREEMENT (ABL);ASSIGNORS:DELL INC.;APPASSURE SOFTWARE, INC.;ASAP SOFTWARE EXPRESS, INC.;AND OTHERS;REEL/FRAME:031898/0001

Effective date: 20131029

Owner name: BANK OF AMERICA, N.A., AS COLLATERAL AGENT, NORTH CAROLINA

Free format text: PATENT SECURITY AGREEMENT (TERM LOAN);ASSIGNORS:DELL INC.;APPASSURE SOFTWARE, INC.;ASAP SOFTWARE EXPRESS, INC.;AND OTHERS;REEL/FRAME:031899/0261

Effective date: 20131029

Owner name: BANK OF AMERICA, N.A., AS COLLATERAL AGENT, NORTH

Free format text: PATENT SECURITY AGREEMENT (TERM LOAN);ASSIGNORS:DELL INC.;APPASSURE SOFTWARE, INC.;ASAP SOFTWARE EXPRESS, INC.;AND OTHERS;REEL/FRAME:031899/0261

Effective date: 20131029

FPAY Fee payment

Year of fee payment: 12

AS Assignment

Owner name: DELL INC., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: CREDANT TECHNOLOGIES, INC., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: ASAP SOFTWARE EXPRESS, INC., ILLINOIS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: DELL PRODUCTS L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: PEROT SYSTEMS CORPORATION, TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: DELL MARKETING L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: FORCE10 NETWORKS, INC., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: COMPELLANT TECHNOLOGIES, INC., MINNESOTA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: SECUREWORKS, INC., GEORGIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: WYSE TECHNOLOGY L.L.C., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: APPASSURE SOFTWARE, INC., VIRGINIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: DELL USA L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

Owner name: DELL SOFTWARE INC., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:040065/0216

Effective date: 20160907

AS Assignment

Owner name: FORCE10 NETWORKS, INC., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: PEROT SYSTEMS CORPORATION, TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: DELL USA L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: DELL SOFTWARE INC., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: WYSE TECHNOLOGY L.L.C., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: APPASSURE SOFTWARE, INC., VIRGINIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: SECUREWORKS, INC., GEORGIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: DELL INC., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: CREDANT TECHNOLOGIES, INC., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: DELL PRODUCTS L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: DELL MARKETING L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: ASAP SOFTWARE EXPRESS, INC., ILLINOIS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: COMPELLENT TECHNOLOGIES, INC., MINNESOTA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:040040/0001

Effective date: 20160907

Owner name: WYSE TECHNOLOGY L.L.C., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: DELL INC., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: PEROT SYSTEMS CORPORATION, TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: FORCE10 NETWORKS, INC., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: SECUREWORKS, INC., GEORGIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: APPASSURE SOFTWARE, INC., VIRGINIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: ASAP SOFTWARE EXPRESS, INC., ILLINOIS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: DELL USA L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: DELL MARKETING L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: COMPELLENT TECHNOLOGIES, INC., MINNESOTA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: CREDANT TECHNOLOGIES, INC., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: DELL SOFTWARE INC., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

Owner name: DELL PRODUCTS L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT;REEL/FRAME:040065/0618

Effective date: 20160907

AS Assignment

Owner name: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT, NORTH CAROLINA

Free format text: SECURITY AGREEMENT;ASSIGNORS:ASAP SOFTWARE EXPRESS, INC.;AVENTAIL LLC;CREDANT TECHNOLOGIES, INC.;AND OTHERS;REEL/FRAME:040134/0001

Effective date: 20160907

Owner name: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT, TEXAS

Free format text: SECURITY AGREEMENT;ASSIGNORS:ASAP SOFTWARE EXPRESS, INC.;AVENTAIL LLC;CREDANT TECHNOLOGIES, INC.;AND OTHERS;REEL/FRAME:040136/0001

Effective date: 20160907

Owner name: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLAT

Free format text: SECURITY AGREEMENT;ASSIGNORS:ASAP SOFTWARE EXPRESS, INC.;AVENTAIL LLC;CREDANT TECHNOLOGIES, INC.;AND OTHERS;REEL/FRAME:040134/0001

Effective date: 20160907

Owner name: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., A

Free format text: SECURITY AGREEMENT;ASSIGNORS:ASAP SOFTWARE EXPRESS, INC.;AVENTAIL LLC;CREDANT TECHNOLOGIES, INC.;AND OTHERS;REEL/FRAME:040136/0001

Effective date: 20160907

AS Assignment

Owner name: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., T

Free format text: SECURITY AGREEMENT;ASSIGNORS:CREDANT TECHNOLOGIES, INC.;DELL INTERNATIONAL L.L.C.;DELL MARKETING L.P.;AND OTHERS;REEL/FRAME:049452/0223

Effective date: 20190320

Owner name: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., TEXAS

Free format text: SECURITY AGREEMENT;ASSIGNORS:CREDANT TECHNOLOGIES, INC.;DELL INTERNATIONAL L.L.C.;DELL MARKETING L.P.;AND OTHERS;REEL/FRAME:049452/0223

Effective date: 20190320

AS Assignment

Owner name: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., TEXAS

Free format text: SECURITY AGREEMENT;ASSIGNORS:CREDANT TECHNOLOGIES INC.;DELL INTERNATIONAL L.L.C.;DELL MARKETING L.P.;AND OTHERS;REEL/FRAME:053546/0001

Effective date: 20200409

AS Assignment

Owner name: WYSE TECHNOLOGY L.L.C., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: SCALEIO LLC, MASSACHUSETTS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: MOZY, INC., WASHINGTON

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: MAGINATICS LLC, CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: FORCE10 NETWORKS, INC., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: EMC IP HOLDING COMPANY LLC, TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: EMC CORPORATION, MASSACHUSETTS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: DELL SYSTEMS CORPORATION, TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: DELL SOFTWARE INC., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: DELL PRODUCTS L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: DELL MARKETING L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: DELL INTERNATIONAL, L.L.C., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: DELL USA L.P., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: CREDANT TECHNOLOGIES, INC., TEXAS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: AVENTAIL LLC, CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

Owner name: ASAP SOFTWARE EXPRESS, INC., ILLINOIS

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:058216/0001

Effective date: 20211101

AS Assignment

Owner name: SCALEIO LLC, MASSACHUSETTS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061324/0001

Effective date: 20220329

Owner name: EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.), TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061324/0001

Effective date: 20220329

Owner name: EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC), MASSACHUSETTS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061324/0001

Effective date: 20220329

Owner name: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.), TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061324/0001

Effective date: 20220329

Owner name: DELL PRODUCTS L.P., TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061324/0001

Effective date: 20220329

Owner name: DELL INTERNATIONAL L.L.C., TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061324/0001

Effective date: 20220329

Owner name: DELL USA L.P., TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061324/0001

Effective date: 20220329

Owner name: DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.), TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061324/0001

Effective date: 20220329

Owner name: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.), TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061324/0001

Effective date: 20220329

AS Assignment

Owner name: SCALEIO LLC, MASSACHUSETTS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061753/0001

Effective date: 20220329

Owner name: EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.), TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061753/0001

Effective date: 20220329

Owner name: EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC), MASSACHUSETTS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061753/0001

Effective date: 20220329

Owner name: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.), TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061753/0001

Effective date: 20220329

Owner name: DELL PRODUCTS L.P., TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061753/0001

Effective date: 20220329

Owner name: DELL INTERNATIONAL L.L.C., TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061753/0001

Effective date: 20220329

Owner name: DELL USA L.P., TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061753/0001

Effective date: 20220329

Owner name: DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.), TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061753/0001

Effective date: 20220329

Owner name: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.), TEXAS

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001);ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT;REEL/FRAME:061753/0001

Effective date: 20220329

OSZAR »