VERITAS Volume Manager 4.1 Administrator's Guide
Administering Cluster Functionality
Cluster Initialization and Configuration
Chapter 10 359
See “Setting the Connectivity Policy on a Shared Disk Group” on
page 377 for information on how to use the vxedit command to set the
connectivity policy on a shared disk group.
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 (rootdg) 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 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 reimport the disk group as shared.
Cluster Initialization and Configuration
Before any nodes can join a new cluster for the first time, you must
supply certain configuration information during cluster monitor setup.
This information is normally stored in some form of cluster monitor
configuration database. The precise content and format of this
information depends on the characteristics of the cluster monitor. The
information required by VxVM is as follows:
• cluster ID
• node IDs
• network addresses of nodes
• port addresses