Managing HP Serviceguard for Linux, Seventh Edition, July 2007

Integrating HA Applications with Serviceguard
Checklist for Integrating HA Applications
Appendix C346
Testing the Cluster
1. Test the cluster:
• Have clients connect.
• Provide a normal system load.
• Halt the package on the first node and move it to the second
node:
# cmhaltpkg pkg1
# cmrunpkg -n node2 pkg1
# cmmodpkg -e pkg1
• Move it back.
# cmhaltpkg pkg1
# cmrunpkg -n node1 pkg1
# cmmodpkg -e pkg1
• Fail one of the systems. For example, turn off the power on node
1. Make sure the package starts up on node 2.
• Repeat failover from node 2 back to node 1.
2. Be sure to test all combinations of application load during the
testing. Repeat the failover processes under different application
states such as heavy user load versus no user load, batch jobs vs
online transactions, etc.
3. Record timelines of the amount of time spent during the failover for
each application state. A sample timeline might be 45 seconds to
reconfigure the cluster, 15 seconds to run fsck on the filesystems, 30
seconds to start the application and 3 minutes to recover the
database.