Veritas Storage Foundation 5.1 SP1 for Oracle RAC Administrator"s Guide (5900-1512, April 2011)

■ VCS (‘had’)
■ vcsmm (membership module for SF Oracle RAC)
■ CVM (kernel messaging)
■ CVM (vxconfigd)
■ CVM (to ship commands from slave node to master node)
The following command can be used to verify the state of GAB ports:
# gabconfig -a
GAB Port Memberships
Port a gen 7e6e7e05 membership 01
Port b gen 58039502 membership 01
Port d gen 588a7d02 membership 01
Port f gen 1ea84702 membership 01
Port h gen cf430b02 membership 01
Port o gen de8f0202 membership 01
Port u gen de4f0203 membership 01
Port v gen db411702 membership 01
Port w gen cf430b02 membership 01
The data indicates that all the GAB ports are up on the cluster having nodes 0 and
1.
For more information on the GAB ports in SF Oracle RAC cluster, see the Veritas
Storage Foundation for Oracle RAC Installation and Configuration Guide.
Examining GAB seed membership
The number of systems that participate in the cluster is specified as an argument
to the gabconfig command in /etc/gabtab. In the following example, two nodes
are expected to form a cluster:
# cat /etc/gabtab
/sbin/gabconfig -c -n2
GAB waits until the specified number of nodes becomes available to automatically
create the port “a” membership. Port “a” indicates GAB membership for an SF
Oracle RAC cluster node. Every GAB reconfiguration, such as a node joining or
leaving increments or decrements this seed membership in every cluster member
node.
A sample port ‘a’ membership as seen in gabconfig -a is shown:
Prevention and recovery strategies
Examining GAB seed membership
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