Modular CFS packages v/s Legacy CFS packages

NOTE: The apply will not complete unless the cluster lock volume group is activated on exactly

one node before applying. There is one exception to this rule: a cluster lock had been previously configured on the same physical volume and volume group.

After the configuration is applied, the cluster lock volume group must be deactivated.

Storing Volume Group and Cluster Lock Configuration Data

After configuring the cluster, create a backup copy of the LVM volume group configuration by using the vgcfgbackup command for each volume group you have created. If a disk in a volume group must be replaced, you can then restore the disk's metadata by using the vgcfgrestore command. The procedure is described under “Replacing Disks” in the “Troubleshooting” chapter.

Be sure to use vgcfgbackup for all volume groups, especially the cluster lock volume group.

NOTE: You must use the vgcfgbackup command to store a copy of the cluster lock disk's configuration data whether you created the volume group using the System Management Homepage (SMH), SAM, or HP-UX commands.

If the cluster lock disk ever needs to be replaced while the cluster is running, you must use the vgcfgrestore command to restore lock information to the replacement disk. Failure to do this might result in a failure of the entire cluster if all redundant copies of the lock disk have failed and if replacement mechanisms or LUNs have not had the lock configuration restored. (If the cluster lock disk is configured in a disk array, RAID protection provides a redundant copy of the cluster lock data. Mirrordisk/UX does not mirror cluster lock information.)

Creating a Storage Infrastructure with Veritas Cluster File System (CFS)

NOTE: Check the Serviceguard/SGeRAC/SMS/Serviceguard Manager Plug-in Compatibility and Feature Matrix and the latest Release Notes for your version of Serviceguard for up-to-date information about support for CFS (and CVM - Cluster Volume Manager) at http://www.hp.com/ go/hpux-serviceguard-docs.

This section provides information about configuring a cluster that uses the Veritas cluster file system (CFS) with Veritas cluster volume manager (CVM) 4.1 and later. Serviceguard enables you to create and manage disk groups and mount points using modular style packages or legacy style packages using CFS. However, creation and administration of modular CFS packages is supported with CVM 5.0.1 HP Serviceguard CFS A.11.20 April 2011 patch (PHSS_41674) or later. Both legacy CFS packages and modular CFS packages can co-exist in the same cluster. Configure CVM/CFS after you configure the cluster. Do not configure applications as a part of modular style CVM disk groups, CFS mount points, check point, or snapshot packages. The Veritas volume manager includes a Java-based GUI, known as the Veritas Enterprise Administrator (VEA). You can create legacy CFS packages using the cfs commands or using VEA. To create modular CFS packages, use the cmmakepkg command. Serviceguard Manager can also be used to create modular CFS packages. For details on how to create modular CFS packages in Serviceguard Manager, see the Serviceguard Manager online help.