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    The documentation states that Active/Active clusters for OCS 2007 are not supported.  Is this a hard and fast rule.  The instances I have available to situate my OCS database will be on 2003 R2 Datacentre Edition with SQL 2005 SP2.  But they will be Active / Active clusters, with the potential of more nodes being introduced in the coming months.  Is there any documentation that highlights why Active / Active nodes are not supported etc. 

     

    Any help is much appreciated.

     

    Antony

    Monday, November 17, 2008 2:39 PM

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    Hi,

    I don't see any technical reason why it's not supported but I do know they are very much concerned about the performance you get out of it. Imagine you have a very loaded SQL instance running on a specific node that takes away 80% of the resources and without you knowing it you also happen to have the OCS SQL instance running on that same node. You can guess why Microsoft doesn't want to support this kind of configurations.

    Microsoft updated some of the SQL Support statement a while ago and now it's a bit more loosly then before:
    http://communicationsserverteam.com/archive/2008/01/18/73.aspx

    Basically as long as you can guarantuee addequate performance of your OCS SQL instance AT ALL TIMES then I don't see why you can't deploy an A/A SQL configuration however I would still recommend you to consult your Microsoft account manager and have them do a PSS Supportability review so that they can accept your solution as supported.

    Sincerely,
    Tonino Bruno

    Monday, November 17, 2008 8:28 PM