A few Questions about DFS.

Discussion in 'Windows Networking' started by marsias, May 8, 2007.

  1. marsias

    marsias Guest

    Hello.

    We have 2DCs-win2k, which have a DFS-folder USERFILES

    1. I had startet a full backup on the First DC in LIVE enviroment.
    The Backup-Report(NT backup) is without errors.
    Normally must a have errors due to openeted files from Users which
    cannot be saved (LIVE enviroment).
    Q: If a file is opened form user goes the NT-Backup and takes the Replicat
    from Second DC to Backup them?
    Otherwise i cannot explain the Backup form openeted files.

    2. We have a Antivirus program which check in realtime the Userfiles in Both
    DC.
    Q: Is this not to much? I mean, if the Antivirus program check only the
    Userfiles form Second DC, is think this is enough because the are replicats
    of the first DC or not?

    3. How can i "see" the ACTIVITY of DFS?
    Microsoft says throu replmon Utility, but this is for AD replication not
    for DFS.
    ACTIVITY means to me : Which file are momentally replicated, which not
    and why.
    Maybe a DFS log anywhere?


    Thanks.
     
    marsias, May 8, 2007
    #1
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  2. marsias

    Anthony Guest

    1. The backup does not know that the file system is part of a DFS. It does
    not contain any logic to get the file from the other DC. There must be
    another explanation for the not-Open files.
    2. I assume it is a two-way replication so although you may use it one-way,
    it is possible to write to the second copy so you should protect it with AV.
    3. As a crude method you can look in the staging directory to see if there
    is activity. There is also a logfile ntfrs_001 etc in Windows\Debug
    Anthony
    http://www.airdesk.co.uk
     
    Anthony, May 8, 2007
    #2
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  3. marsias

    marsias Guest

    Hello Anthony.
    Thank you for the response.
    What for explaination can this be?
    Its two-way replication.
    Can i change to one- way Replication by go to Replication Policy and than
    Disable the Replikation on DC2?

    I have following:

    DC1 Replication : YES c:\userfiles
    DC2 Replication : YES c:\userfiles <------here Disable?

    What about Clients?

    Some Clients have as ACTIVE under DFS --- DC1 others DC2.
    IF i change this to DC1 for all clients are this change permanatly or
    change this after boot to random DC?
    Stanging directory are momentaly empty.
    The logs under windows\debug are not "readble"

    Thanks.
     
    marsias, May 8, 2007
    #3
  4. marsias

    Anthony Guest

    1) I am afraid that is too broad a question for me to attempt an answer.
    What files do you think should be locked?
    2) W2K3 DFS Replication will allow you to do Hub Spoke replication. I don't
    have a W2K to check, but I thought it was just multi-master, so you can't
    have a one-way replication. The DFS client is updated from AD (in a domain
    DFS) and is designed to find the local site replica. I don't know of a way
    to force it to use one replica only.
    3) I should also mention Ultrasound and Sonar are two great tools for
    monitoring replication on Win2K.
    Anthony
    http://www.airdesk.co.uk
     
    Anthony, May 8, 2007
    #4
  5. marsias

    marsias Guest

    Hallo Anthony.
    The files was *.doc, *xls , all this files was opened with the users in
    the moment of backup.

    I think also, this one-way Replication are not possible in win2000 Server
    enviroment.
    Problem here is:
    A user opened a file which was in DFS-link on \\DC2\test.txt, and made
    change on it.
    in the meantime a other user tried to open the SAME file (test.txt),but
    because the active DFS-link was on \\DC1\test.txt, he has opened a "old"
    file not the actually.
    Do you know a resolution for this??

    Thanks.
     
    marsias, May 8, 2007
    #5
  6. marsias

    Anthony Guest

    1) I can't give you an authoritative answer on that. Maybe someone else can.
    It depends on the nature of the lock, which I think depends on the version
    of Word, Excel.
    2) I don't think there is a resolution for that. In the documentation for
    W2K FRS it says it is not suitable for simultaneous editing. It is ideal for
    large read-only libraries. With W2K3 you can create one-way replication and
    read-only replicas, but it sounds like you want to be able to edit at both
    locations.
    Anthony
    http://www.airdesk.co.uk
     
    Anthony, May 8, 2007
    #6
  7. marsias

    marsias Guest

    but it sounds like you want to be able to edit at both

    NO. i dont wont to edit both(original and replica)

    I wont, if one user opens the "original" file the replicat of this file
    becomes readonly.

    thank you.
     
    marsias, May 9, 2007
    #7
  8. marsias

    Anthony Guest

    Yes, I know you don't want _simultaneous_ edits.
    W2K FRS won't do this. W2K3 R2DFS Replication has a feature to protect
    against simultaneous edits:
    http://technet2.microsoft.com/windo...c1ae-4a9f-9724-80c679596e6b1033.mspx?mfr=true
    which may be sufficient for your needs.

    To really protect against simultaneous edits across replicas you would need
    Synchronous file replication, where the file is locked until saved at both
    ends. It really depends what you are using the replicas for.
    Anthony
    http://www.airdesk.co.uk
     
    Anthony, May 9, 2007
    #8
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