HP UX Serviceguard Storage Management Software manual Legal Notices

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Legal Notices

© Copyright 2005-2008 Hewlett-Packard Development Company, L.P.

Confidential computer software. Valid license from HP required for possession, use, or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor’s standard commercial license.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Oracle ® is a registered trademark of Oracle Corporation.

Copyright © 2008 Symantec Corporation. All rights reserved. Symantec, the Symantec Logo, Veritas, and Veritas Storage Foundation are trademarks or registered trademarks of Symantec Corporation or its affiliates in the U.S. and other countries. Other names may be trademarks of their respective owners.

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Contents Second Edition Legal Notices Contents Cluster Volume Manager Administration TroubleshootingPrinting History Printing HistoryPage Technical Overview Cluster File System Failover Overview of Cluster File System ArchitectureCluster File System Design Group Lock ManagerVxFS Functionality on Cluster File Systems Supported FeaturesCFS Supported Features 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 Cluster Communication Veritas Cluster Volume Manager FunctionalityRole of Component Products Membership PortsAsymmetric Mounts About CFSCluster File System and The Group Lock Manager Parallel I/O Primary and Secondary Mount OptionsCluster File System Backup Strategies Distributing Load on a Cluster Error Handling PolicySynchronizing Time on Cluster File Systems 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 CommandsFstab file Time Synchronization for Cluster File SystemsGrowing a Cluster File System Distributing the Load on a ClusterCluster File System Administration Performance Considerations Cluster Snapshot CharacteristicsSnapshots for Cluster File Systems 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 Incorrect Permissions for Root on Remote System Installation IssuesInaccessible System Resource Temporarily UnavailableInstallation Issues Mount Failures Cluster File System ProblemsUnmount Failures High Availability Issues Command FailuresPerformance Issues Cluster File System Problems Appendix a