Redhat Linux Cluster Tips

To view the cluster status:
#clustat

To Failover the services from one node to other
#clusvcadm -r -m

-r = relocate
-m=member

ex:
#clusvcadm -r DEVDB -m host2

in case if the status of the service is Failed, when you try to failover, try this:

#clusvcadm -d DEVDB -m host1
# clusvcadm -e DEVDB -m host2

In the above example -d switch will Disable the service on the host1 and will enable it on the host2.
-e switch will enable the service.

LUCI is the web based tool used to manage the RHCS - Redhat Cluster Service.

To freeze the particular service:

# clusvcadm -z DEVDB -m host1

To unfreeze the particular service:

# clusvcadm -Z DEVDB -m host1