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Verifying that your system is ready for a switchback

If your system is already in the switchover state, you can use the -simulate option to preview the results of a switchback operation.

  1. Simulate the switchback operation:
    1. From either surviving node's prompt, change to the advanced privilege level: set -privilege advanced

      You need to respond with y when prompted to continue into advanced mode and see the advanced mode prompt (*>).

    2. Perform the switchback operation with the -simulate parameter: metrocluster switchback -simulate
    3. Return to the admin privilege level: set -privilege admin
  2. Review the output that is returned.

    The output shows whether the switchback operation would run into errors.

Example of verification results​

The following example shows the successful verification of a switchback operation:

cluster4::*> metrocluster switchback -simulate 
  (metrocluster switchback)
[Job 130] Setting up the nodes and cluster components for the switchback operation...
DBG:backup_api.c:327:backup_nso_sb_vetocheck : MCC Switch Back
[Job 130] Job succeeded: Switchback simulation is successful.                        

cluster4::*> metrocluster op show
  (metrocluster operation show)
  Operation: switchback-simulate
      State: successful
 Start Time: 5/15/2014 16:14:34
   End Time: 5/15/2014 16:15:04
     Errors: -

cluster4::*> job show -name Me*
                            Owning
Job ID Name                 Vserver    Node           State
------ -------------------- ---------- -------------- ----------
130    MetroCluster Switchback 
                            cluster4 
                                       cluster4-01 
                                                      Success
       Description: MetroCluster Switchback Job - Simulation