Clustered SQL Server Instance

  • Hi,

    When we take a SQL Server resource (of a SQL Instance) on a cluster offline, does it stop the SQL Server Service on the node that owns that SQL Server Instance?

    Could anyone help me what actually happens when we take the SQL resource offline on a cluster?

    Thank You,

    Yours,

    SQL Buddy.

  • I am 95% sure that when SQL is taken offline that it stops the service on whatever node has it..

    CEWII

  • When you take a resource group in a cluster offline, all resources in that group are taken offline also. They are not failed over, which means the services are stopped or the fileshares are no longer accessible.

    Jeffrey Williams
    “We are all faced with a series of great opportunities brilliantly disguised as impossible situations.”

    ― Charles R. Swindoll

    How to post questions to get better answers faster
    Managing Transaction Logs

  • Hi Elliott,

    Thanks a lot for your reply.

    Yours

    SQL Buddy.

  • Hi Jeffrey,

    Thank you very much for your reply. You cleared all my doubts. That's a fantastic answer. I really appreciate that.

    Yours

    SQL Buddy

  • You are welcome.

    Jeffrey Williams
    “We are all faced with a series of great opportunities brilliantly disguised as impossible situations.”

    ― Charles R. Swindoll

    How to post questions to get better answers faster
    Managing Transaction Logs

  • Yes, you are very welcome..

    I Love Clustering, once you get the concepts down and you actually get good hardware..

    CEWII

  • What happens when you failover? Is it again a SQL restart?

    Let's say for eg., one of my job is running in a clustered instance and a failover happens...what will happen to my job? Will it fail or succeed?

  • SUBRAHMANYA HEDGE (7/2/2009)


    What happens when you failover? Is it again a SQL restart?

    Let's say for eg., one of my job is running in a clustered instance and a failover happens...what will happen to my job? Will it fail or succeed?

    It fails, just as if it was a nonclustered server that crashes.

  • The reason that the 'fail' occurs is that all of the cluster resources on the original/'active' server must be shut down on the physical server hosting those resources so that they can then be restarted on the new server/host. This shutdown/restart cycle is logically similar to rebooting a server - although it shouldn't take as long, and occurs in an automated/planned fashion. SQL Server transactions and jobs will of course suffer the outage while the failover occurs as the instance (as noted previously) does go down.

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