Failover Clustering and AlwaysOn Availability Groups

  • Does this opening gambit from BOL make sense?

    1/ AlwaysOn Availability Groups, the high availability and disaster recovery solution introduced in SQL Server 2012, requires Windows Server Failover Clustering (WSFC).

    2/ Also, though AlwaysOn Availability Groups is not dependent upon SQL Server Failover Clustering, you can use a failover clustering instance (FCI) to host an availability replica for an availability group.

    SQL DBA
    Every day is a school day, and don't trust anyone who tells you any different.
    http://sqlblogness.blogspot.co.uk

  • All detailed here[/url] and here[/url]

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    "Ya can't make an omelette without breaking just a few eggs" 😉

  • Thank you for your re-direction to another resource (much like BOL). I was just after a quick opinion as they seemed to contradict themselves, but nevertheless.

    SQL DBA
    Every day is a school day, and don't trust anyone who tells you any different.
    http://sqlblogness.blogspot.co.uk

  • I explain it all in the 2 resources I wrote 😉

    You might want to read them.

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    "Ya can't make an omelette without breaking just a few eggs" 😉

  • Windows Server Failover Clustering and SQL Server Failover Clustering are separate technologies. The former is the clustering of the Operating System and the latter is of SQL Server instances (which also depends on the former), so the article is in no way contradictory.

  • Many thanks for your comment - I had misinterpreted the clustering as being the same. Now that makes sense.

    SQL DBA
    Every day is a school day, and don't trust anyone who tells you any different.
    http://sqlblogness.blogspot.co.uk

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