Host Failure

In this scenario, the host on which the application is running is lost and eventually all hosts in the system zone or cluster are lost.

  To perform the host failure test

1. Halt or shut down the host on which the application is running.

   The service group fails over to hostb and devices are in the RW/SYNCHRONIZED state.

2. Halt or shut down hostb.

   In a replicated data cluster, the group fails over to hostc or hostd depending on the FailOverPolicy in the cluster.

   In a global cluster, a cluster down alert appears and gives you the opportunity to fail over the service group manually.

   In both environments, the devices transition to the RW/FAILED OVER state and start on the target host.

3. Reboot the two hosts that were shut down.
4. Switch the service group to its original host when VCS starts.
   1. In the Service Groups tab of the Cluster Explorer configuration tree, right-click the service group.
   2. Click Switch To, and click the system on which the service group was initially online (hosta).

   The service group comes online on hosta and devices transition to the SYNCINPROG state and then to the SYNCHRONIZED state.