HP UX Serviceguard Storage Management Software manual Cluster File System Administration

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Cluster File System Administration

Topics in this chapter include:

•“Cluster Messaging - GAB” on page 29

•“Cluster Communication - LLT” on page 30

•“Volume Manager Cluster Functionality Overview” on page 31

•“Cluster File System Overview” on page 32

•“Cluster File System Administration” on page 34

•“Snapshots for Cluster File Systems” on page 37

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Chapter 3

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Contents Second Edition Legal Notices Contents Cluster Volume Manager Administration TroubleshootingPrinting History Printing HistoryPage Technical Overview Overview of Cluster File System Architecture Cluster File System DesignCluster File System Failover Group Lock ManagerCFS Supported Features Supported FeaturesVxFS Functionality on Cluster File Systems Unsupported Features CFS Unsupported FeaturesCFS Unsupported Features Advantages To Using CFS Benefits and ApplicationsWhen To Use CFS Benefits and Applications Chapter Cluster File System Architecture Veritas Cluster Volume Manager Functionality Role of Component ProductsCluster Communication Membership PortsCluster File System and The Group Lock Manager About CFSAsymmetric Mounts Parallel I/O Primary and Secondary Mount OptionsCluster File System Backup Strategies Error Handling Policy Synchronizing Time on Cluster File SystemsDistributing Load on a Cluster File System TuneablesAbout Veritas Cluster Volume Manager Functionality Example of a Four-Node ClusterPrivate and Shared Disk Groups Activation Modes for Shared Disk Groups Activation Modes for Shared Disk GroupsConnectivity Policy of Shared Disk Groups Allowed and conflicting activation modesLimitations 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 File System Overview Cluster and Shared MountsAsymmetric Mounts Cluster File System Administration Cluster File System CommandsTime Synchronization for Cluster File Systems Growing a Cluster File SystemFstab file Distributing the Load on a ClusterCluster File System Administration Cluster Snapshot Characteristics Snapshots for Cluster File SystemsPerformance Considerations Creating a Snapshot on a Cluster File System# 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 Disk Group Failure Policy Behavior of Master Node for Different Failure PoliciesRecovery in a CVM Environment Troubleshooting Installation Issues Inaccessible SystemIncorrect Permissions for Root on Remote System Resource Temporarily UnavailableInstallation Issues Unmount Failures Cluster File System ProblemsMount Failures Performance Issues Command FailuresHigh Availability Issues Cluster File System Problems Appendix a