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Single vs multiple DAG

Discussion in 'Software' started by Theprof, Mar 27, 2012.

  1. Theprof

    Theprof Petabyte Poster Forum Leader

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    Hey guys,

    Quick question, when would you guys consider using more than one DAG? Here's what I am thinking.

    1. For three or more sites I would think more than one DAG would be available
    2. Lagged copies of DB's in their own DAG
    3. Primary and secondary mailbox servers split into their own DAG when more than one datacenter.

    However what would be the true benefit of having more than one DAG? More resiliency, HA, etc?
     
    Certifications: A+ | CCA | CCAA | Network+ | MCDST | MCSA | MCP (270, 271, 272, 290, 291) | MCTS (70-662, 70-663) | MCITP:EMA | VCA-DCV/Cloud/WM | VTSP | VCP5-DT | VCP5-DCV
    WIP: VCAP5-DCA/DCD | EMCCA
  2. Theprof

    Theprof Petabyte Poster Forum Leader

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    It looks like in an Active/Active type datacenter, multiple DAG should be deployed to allow failovers... I guess I answered my own question.
     
    Certifications: A+ | CCA | CCAA | Network+ | MCDST | MCSA | MCP (270, 271, 272, 290, 291) | MCTS (70-662, 70-663) | MCITP:EMA | VCA-DCV/Cloud/WM | VTSP | VCP5-DT | VCP5-DCV
    WIP: VCAP5-DCA/DCD | EMCCA
  3. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

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    I take it you are doing this for a proposal for a customer mate?
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  4. Theprof

    Theprof Petabyte Poster Forum Leader

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    Actually not this time mate, this is internal stuff.. We're upgrading from Exchange 2007 CCR to 2010...
     
    Certifications: A+ | CCA | CCAA | Network+ | MCDST | MCSA | MCP (270, 271, 272, 290, 291) | MCTS (70-662, 70-663) | MCITP:EMA | VCA-DCV/Cloud/WM | VTSP | VCP5-DT | VCP5-DCV
    WIP: VCAP5-DCA/DCD | EMCCA
  5. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

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    Cool - always good to try these things on your own network first! :)
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  6. Theprof

    Theprof Petabyte Poster Forum Leader

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    Funny thing is, I've already done a few Exchange 2010 installation including ones with a DR site... but I never did an Active/Active install so I was just curious.. but I always figure things out in the end :)
     
    Certifications: A+ | CCA | CCAA | Network+ | MCDST | MCSA | MCP (270, 271, 272, 290, 291) | MCTS (70-662, 70-663) | MCITP:EMA | VCA-DCV/Cloud/WM | VTSP | VCP5-DT | VCP5-DCV
    WIP: VCAP5-DCA/DCD | EMCCA

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