CCR replication query

Posted on 2011-05-01
Last Modified: 2012-05-11

We'll shortly be building an Exchange 2007 SP2 CCR cluster with 50 Storage Groups.

Initially, we'll build Node1, place a few test mailboxes on a couple of DB's, then install the Node2 Passive node.

Does anyone know, when the initial seeding and log replication takes place between Node1 and Node2, is there any order to it? I mean, does SG1 seed and replicate, and then once that's done, then SG2 and so on? Or do they all start at the same time and go on, meaning SG10 may finish before SG1 for instance?
Question by:jasonwatts1972
    LVL 74

    Accepted Solution

    That's actually a really good question.

    All the documentation simply says "all configured storage groups and databases are copied".  It doesn't give an indication of order or if it's done en-masse and to be honest, I've never stuck around to find out.

    Get-StorageGroupCopyStatus will give you details about the progress of the copy but again, I've never continually done this to monitor progress.  The only time I've done it I always leave the copy overnight without monitoring progress.
    LVL 8

    Expert Comment

    I'm not sure how the work is handled in the Background. But I have seen the seeding process  happening simultaneously for more than 10 Storage Groups simultaneously and the time takes depends the DB and log size.

    Author Comment

    Thanks guys - so if I had 50 SG's, are you saying that all will start replicating at the same time (so at the half way time, all SG's had replicated about 50% of their data), not that SG1 will go first and complete, then SG2 will go then complete etc (so that at half way time, 25 SG's had replicated fully but the others hadn't even started)?
    LVL 74

    Expert Comment

    by:Glen Knight
    Yes, I believe that's correct.  All SG's will start at the same time.

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