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Time taken for a cluster failover

  • November 11, 2008 at 9:57 pm

    #124846

    In a two node cluster using physical rather than virtual machine is 6 to 10 min a reasonable time for a failover?

    Both nodes have 16G of RAM and connect to a SAN for disks.

    HP Blades BL460C.

    Failing over a group using the cluster administrator is much more prompt.

    Thanks

    Graham

  • November 12, 2008 at 3:28 am

    #897400

    The failover time depends on the number of transactions which need to be rolledback or forward and the time it akes to start up all the services. 6- 10 minutes is not great but without knowing the system I can't ell if there's anything wrong.

    You can try to change the default recovery interval, but be ware of the fact that that can influence performace. See here for some more info: http://technet.microsoft.com/en-us/library/ms189262.aspx

    [font="Verdana"]Markus Bohse[/font]

  • November 12, 2008 at 5:16 pm

    #897846

    Would you expect any node of the cluster to be available during a failover?

    Would you expect that it tracks what is happening and processes that data once it is up?

    Thanks

    Graham Okely

    B App Sc (Info Tech)

  • November 12, 2008 at 5:35 pm

    #897849

    Graham.Okely (11/12/2008)

    Would you expect any node of the cluster to be available during a failover?

    Would you exepect that it tracks what is happening and processes that data once it is up?

    Thanks

    Graham Okely

    B App Sc (Info Tech)

    Knowing what it does - no I wouldn't expect it to be available during a failover. I've had occasion to have to length the failover time because my server was playing "failover ping pong": fail near the tail end of a 2 hour operation, the other node picks up and tries to start, starts processing the big operation. But it takes longer than 15 minutes to finish this 3-hour process, so the Cluster service assumes this restart is hosed, fails over AGAIN, and the dance starts over......

    ----------------------------------------------------------------------------------
    Your lack of planning does not constitute an emergency on my part...unless you're my manager...or a director and above...or a really loud-spoken end-user..All right - what was my emergency again?

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