HP UX Serviceguard Storage Management Software manual Cluster File System Administration

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Cluster File System Administration

The following HP Serviceguard Storage Management Suite bundles include the Veritas Storage Foundation™ 5.0 Cluster File System (CFS) and Cluster Volume Manager (CVM) by Symantec:

• Bundles T2775CA, T2776CA, and T2777CA of the HP Serviceguard Storage Management Suite version A.02.00 for HP-UX 11i v2

• Mission Critical Operating Environment (MCOE) bundles T2795CA, T2796CA, and T2797CA of the HP Serviceguard Storage Management Suite version A.02.00 for HP-UX 11i v2

• Bundles T2775CB, T2776CB, T2777CB of the HP Serviceguard Storage Management Suite version A.02.00 for HP-UX 11i v3

• High Availability Operating Environment (HAOE) bundles T8680CB, T8681CB, and T8682CB, of the HP Serviceguard Storage Management Suite version A.02.00 for HP-UX 11i v3

• Data Center Operating Environment (DCOE) bundles T8684CB, T8685CB, and T8686CB of the HP Serviceguard Storage Management Suite version A.02.00 for HP-UX 11i v3

 

CFS enables multiple hosts to mount and perform file operations concurrently on the

 

same storage device. To operate in a cluster configuration, CFS requires the integrated

 

set of Veritas ™ products by Symantec that are included in the HP Serviceguard Storage

 

Management Suite.

 

CFS includes Low Latency Transport (LLT) and Group Membership Atomic Broadcast

 

(GAB) packages. The LLT package provides node-to-node communications and monitors

 

network communications. The GAB package provides cluster state, configuration, and

 

membership services. It also monitors the heartbeat links between systems to ensure

 

that they are active.

 

There are other packages provided by HP Serviceguard that provide application failover

 

support when you install CFS as part of a high availability solution.

 

CFS also requires the cluster volume manager (CVM) component of the Veritas™

 

Volume Manager (VxVM) to create the shared volumes necessary for mounting cluster

 

file systems.

 

 

NOTE

To install and administer CFS, you should have a working knowledge of cluster file

 

systems. To install and administer application failover functionality, you should have a

 

working knowledge of HP Serviceguard. For more information on these products, refer to

 

the HP Serviceguard documentation and the Veritas™ Volume Manager (VxVM)

 

documentation available in the /usr/share/doc/vxvm directory after you install CFS.

 

You can also access this documentation at: http://www.docs.hp.com

 

The HP Serviceguard Storage Management Suite Release Notes contain an extensive list

 

of release specific HP and Veritas ™ documentation with part numbers to facilitate

 

search and location at: http://www.docs.hp.com

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Contents Second Edition Legal Notices Contents Troubleshooting Cluster Volume Manager AdministrationPrinting History Printing HistoryPage Technical Overview Group Lock Manager Overview of Cluster File System ArchitectureCluster File System Design Cluster File System FailoverSupported Features CFS Supported FeaturesVxFS Functionality on Cluster File Systems CFS Unsupported Features Unsupported FeaturesCFS Unsupported Features Benefits and Applications Advantages To Using CFSWhen To Use CFS Benefits and Applications Chapter Cluster File System Architecture Membership Ports Veritas Cluster Volume Manager FunctionalityRole of Component Products Cluster CommunicationAbout CFS Cluster File System and The Group Lock ManagerAsymmetric Mounts Primary and Secondary Mount Options Parallel I/OCluster File System Backup Strategies File System Tuneables Error Handling PolicySynchronizing Time on Cluster File Systems Distributing Load on a ClusterExample of a Four-Node Cluster About Veritas Cluster Volume Manager FunctionalityPrivate and Shared Disk Groups Activation Modes for Shared Disk Groups Activation Modes for Shared Disk GroupsAllowed and conflicting activation modes Connectivity Policy of Shared Disk GroupsLimitations of Shared Disk Groups About Veritas Cluster Volume Manager Functionality Chapter Cluster File System Administration Cluster File System Administration Cluster Messaging GAB Cluster Communication LLT Volume Manager Cluster Functionality Overview Cluster and Shared Mounts Cluster File System OverviewAsymmetric Mounts Cluster File System Commands Cluster File System AdministrationDistributing the Load on a Cluster Time Synchronization for Cluster File SystemsGrowing a Cluster File System Fstab fileCluster File System Administration Creating a Snapshot on a Cluster File System Cluster Snapshot CharacteristicsSnapshots for Cluster File Systems Performance Considerations# cfsumount /mnt1snap Cluster Volume Manager Overview of Cluster Volume Management Example of a 4-Node Cluster Disk group activation mode restrictions Either of the write modes on other nodes will fail # cfsdgadm display Behavior of Master Node for Different Failure Policies Disk Group Failure PolicyRecovery in a CVM Environment Troubleshooting Resource Temporarily Unavailable Installation IssuesInaccessible System Incorrect Permissions for Root on Remote SystemInstallation Issues Cluster File System Problems Unmount FailuresMount Failures Command Failures Performance IssuesHigh Availability Issues Cluster File System Problems Appendix a
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