HP Serviceguard Storage Management Suite for VERITAS manual CFS Administration, Modular Style

CFS Administration

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.

Creating CVM Disk Groups and CFS Mount Points

There are two ways to create CVM Diskgroups and CFS mount points:

•Modular Style (Recommended by HP)

•Legacy Style

Modular Style

With Improved CFS Integration, modular Disk group, Mount point, Snapshot, and Checkpoint packages can be created and configured using traditional commands:

•cmmakepkg

•cmapplyconcf

•cmrunpkg

You cannot manage modular CFS packages using legacy CFS commands:

•cfsdgadm

•cfsmntadm

•cfsmount

•cfsumount

You must use the following commands to manage modular CFS packages:

•cmmakepkg

•cmapplyconf

•cmrunpkg

•cmhaltpkg

•cmdeleteconf

The cmmakepkg command enables you to create a package configuration file. It uses the Serviceguard CFS module that contains attributes for CVM disk groups, mount points, storage snapshot and storage checkpoint parameters. A modular CFS package template can be generated using the sg/cfs_all template. Modular CFS packages run as multi-node packages and have a dependency on SG-CFS-pkg (the CVM system multi-node package). The dependency on SG-CFS-pkg is automatically configured in the modular CFS package configuration file created

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