Skip to main content

Performing switchover for tests or maintenance

If you want to test the MetroCluster functionality or to perform planned maintenance, you can perform a negotiated switchover in which one cluster is cleanly switched over to the partner cluster. You can then heal and switch back the configuration.

About this task



  1. Verifying that your system is ready for a switchover
    You can use the -simulate option to preview the results of a switchover operation. A verification check gives you a way to verify that most of the preconditions for a successful run are met before you start the operation.
  2. Sending a custom AutoSupport message prior to negotiated switchover
    Before performing a negotiated switchover, you should issue an AutoSupport message to notify Lenovo technical support that maintenance is underway. The negotiated switchover might result in plex or MetroCluster operation failures that trigger AutoSupport messages. Informing technical support that maintenance is underway prevents them from opening a case on the assumption that a disruption has occurred.
  3. Performing a negotiated switchover
    A negotiated switchover cleanly shuts down processes on the partner site, and then switches over operations from the partner site. You can use a negotiated switchover to perform maintenance on a MetroCluster site or to test the switchover functionality.
  4. Output for the storage aggregate plex show command is indeterminate after a MetroCluster switchover
    When you run the storage aggregate plex show command after a MetroCluster switchover, the status of plex0 of the switched over root aggregate is indeterminate and is displayed as failed. During this time, the switched over root is not updated. The actual status of this plex can only be determined after the MetroCluster healing phase.
  5. Confirming that the DR partners have come online
    After the switchover is complete, you should verify that the DR partners have taken ownership of the disks and the partner SVMs have come online.
  6. Healing the configuration
    After a negotiated switchover operation, you must perform the healing operations in specific order to restore MetroCluster functionality. The procedure you use depends on the type of MetroCluster configuration you have.
  7. Performing a switchback
    After you heal the MetroCluster configuration, you can perform the MetroCluster switchback operation. The MetroCluster switchback operation returns the configuration to its normal operating state, with the sync-source storage virtual machines (SVMs) on the disaster site active and serving data from the local disk pools.
  8. Verifying a successful switchback
    After performing the switchback, you want to confirm that all aggregates and storage virtual machines (SVMs) are switched back and online.