DFS in a W2K WAN Enviroment Question

Discussion in 'File Systems' started by Christopher King, Aug 17, 2004.

  1. I am reading lots of the documentation that abounds on the topic of DFS
    (both for 2000 & 2003) and am unsure on one aspect that is important to
    our future deployment. I was hoping more knowledgeable minds than mine
    could help clear it up for me:

    We have a win2k environment and 3 WAN sites about to be set up at
    varying link speeds from frac-T up. We want two of the locations (HQ & 1
    site--for now) to have DFS replicas of constantly accessed data. The
    impression I have gotten from all my reading so far is that win2k-DFS
    will load balance, but that 2k3-DFS would direct users based on their AD
    sites. The latter of course would be far better in a WAN environment.

    Is this the case? And if so, is there a way to get the win2k version to
    do the same or does it require a move to a 2k3 AD domain?

    Thanks

    Chris
     
    Christopher King, Aug 17, 2004
    #1
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  2. In W2K, DFS has two ways of sorting referrals:

    The default method is to put targets in the same site as the client at the
    top of the referral list (in random order), followed by random list of
    remaining targets.
    You can also restrict referrals so that they only include targets in the
    same site as the client.

    In W2K3, a third option is to put targets in the same site as the client at
    the top of the referral list (in random order), followed by a list of
    targets sorted by cost (lowest to highest). For this to work, all DCs and
    DFS root servers must run W2K3.

    So in summary, both W2K DFS and W2K3 DFS default to putting targets in the
    same site as the client at the top of the referral list. As long as a target
    exists in a client's site, the client will go to this target. It's only when
    no same-site target exists that a client can be directed to a low-cost
    target (if W2K3 is in place and this option is enabled) or to a random
    target (if W2K is in place).

    If you're not already familiar with our website, check out
    www.microsoft.com/dfs.
     
    Jill Zoeller [MSFT], Aug 17, 2004
    #2
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