106 Highly Available WebSphere Business Integration Solutions
7.2.4 Fallback
Fallback refers to the movement of a resource group from a secondary or a
failover node to the primary node, which is being reintegrated into the cluster. In
the current WebSphere Business Integration cluster, automatic fallback is
disabled. However, manual reintegration should be validated:
1. Validate manual fallback:
a. Bring node 1 down:
shutdown -r now
b. Node 1 resource group fails over to node 2.
c. Verify failover by looking at the HACMP log file:
tail -f /tmp/hacmp.out
d. Start up cluster on node 1 after node 1 is back up:
smitty clstart
e. Observe that the resource groups are still running on node 2 even though
the cluster on node 1 is backed up.
f. Repeat the above ...