Veritas Storage Foundation 5.1 SP1 Cluster File System Administrator"s Guide (5900-1738, April 2011)

Table 2-6

Policies (continued)

DescriptionPolicy

In the event of disks failing, the failures are confined to the particular

nodes that saw the failure. However, this policy is not highly available

because it fails the node even if one of the mirrors is available. Note

that an attempt is made to communicate with all nodes in the cluster

to ascertain the disks’ usability. If all nodes report a problem with the

disks, a cluster-wide detach occurs.

Local

Limitations of shared disk groups

The cluster functionality of VxVM does not support RAID-5 volumes, or task

monitoring for cluster-shareable disk groups. These features can, however, be

used in private disk groups that are attached to specific nodes of a cluster. Online

relayout is supported provided that it does not involve RAID-5 volumes.

The root disk group cannot be made cluster-shareable. It must be private.

Only raw device access may be performed via the cluster functionality of VxVM.

It does not support shared access to file systems in shared volumes unless the

appropriate software, such as Veritas Storage Foundation Cluster File System, is

installed and configured.

If a shared disk group contains unsupported objects, deport it and then re-import

the disk group as private on one of the cluster nodes. Reorganize the volumes into

layouts that are supported for shared disk groups, and then deport and re-import

the disk group as shared.

Storage Foundation Cluster File System and Veritas

Volume Manager cluster functionality agents

Agents are VCS processes that manage predefined resource types. SFCFS and

CVM require agents to interact with VCS. Agents bring resources online, take

resources offline, monitor resources, and report any state changes to VCS. VCS

bundled agents are part of VCS and are installed when VCS is installed. The SFCFS

and CVM agents are add-on resources to VCS specifically for the Veritas File

System and Veritas Volume Manager.

See the Veritas Storage Foundation Cluster File System Installation Guide.

Storage Foundation Cluster File System architecture

Storage Foundation Cluster File System and Veritas Volume Manager cluster functionality agents