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Enable-Mailbox doesn't require "Database" parameter?

Answered Enable-Mailbox doesn't require "Database" parameter?

  • 24 April 2009 19:14
     
     
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    I found a rather curious feature. Enable-Mailbox doesn’t require -Database parameter like it used to. How does it select which database to use? Is there some kind of resource manager in Exchange 2010 and if so how does it work?

     

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  • 24 April 2009 19:25
     
     
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    E2K10 has some logic built in that randomly picks a DB when creating a mailbox.
    Henrik Walther | MVP: Exchange | MCM: Exchange 2007 | MSExchange.org
     
  • 24 April 2009 19:51
     
     
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    I guess I would like 'some logic' explained.
    Is it really random, or does it look into the number of mailboxes per database and picks the one that has smaller amount?
     
  • 24 April 2009 20:40
     
     Jawab
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    I guess I would like 'some logic' explained.

    I believe this is the logic in place today, I don't know if it'll change by RTM.

    1. The server gathers all DBs in the org.
    2. Excludes any DB that has the "IsExcludedFromProvisioning" boolean flag set to true.
    3. Excludes any not in the same AD site as the server where the cmdlet is running.
    4. Randomly picks a DB from what is left.
    5. Checks if it is available via Active Manager.
    6. If available, the mailbox is provisioned and you are done.
    7. If unavailable, repeat #4-#6.
    Brian Day / MCSA / CCNA, Exchange/AD geek.
     
  • 24 April 2009 20:44
     
     
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    Thanks Brian, this is really interesting!
    But what/who is 'Active Manager'?
     
  • 24 April 2009 20:47
     
     Saran Jawaban
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    Thanks Brian, this is really interesting!
    But what/who is 'Active Manager'?

    Now that 2010 hardly relies on windows failover clustering but for only a couple things, it is the new service 2010 uses to determine what DBs are active on what nodes in the DAG. If I understand it correctly, it is also the service being used to bring DBs online if another copy goes offline.
    Brian Day / MCSA / CCNA, Exchange/AD geek.
    • Disarankan sebagai Jawaban oleh Anatoly Ivanov 24 April 2009 20:47
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  • 25 April 2009 14:16
     
     
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    hi,

    introduction about DAG. Please look at ;

    http://blogs.3sharp.com/timr/archive/2009/04/16/5048.aspx

    regards,
    Exchange - MVP | www.cozumpark.com | www.mumincicek.com