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Cluster environment requirements

Use these steps if the configuration contains a cluster, which is a set of hosts that share a set of disks.

 To configure a cluster

1. Obtain a license for the optional VxVM cluster feature for a Sun Cluster from your Sun Customer Support channel.
2. If you plan to encapsulate the root disk group, decide where you want to place it for each node in the cluster. The root disk group, usually aliased as bootdg, contains the volumes that are used to boot the system. VxVM sets bootdg to the appropriate disk group if it takes control of the root disk. Otherwise bootdg is set to nodg. To check the name of the disk group, enter the command:

   # vxdg bootdg

3. Decide the layout of shared disk groups. There may be one or more shared disk groups. Determine how many you wish to use.
4. If you plan to use Dirty Region Logging (DRL) with VxVM in a cluster, leave a small amount of space on the disk for these logs. The log size is proportional to the volume size and the number of nodes. Refer to the Veritas Volume Manager Administrator's Guide and the Veritas Storage Foundation Cross-Platform Data Sharing Administrator's Guide for more information on DRL.
5. Install the license on every node in the cluster.

   See Enabling cluster support in VxVM (optional)