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pharford57

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pharford57

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August 22nd, 2011 00:00

Replicator V2 copying entire file system every time

hi guys

has anyone come across replicator v2 copying the entire file system everytime after the initial "FULL COPY" is done ?

we robocopy data to the fs everynight and that fs is replicated to a second celerra and everytime it starts to replicate (time out of sync at 8 hours) it will copy the entire filesystem

We are doing this (robocopy and replicating) on other systems but do not get this condition

Anyone any suggestions on where to start ? there are no errors that i can see and as time goes on the replication begins to exapnd into a huge amount of checkpooint storage as the replications don't finishe before the next one is due to begin

Thanks

Paul

Message was edited by: Beagless

  • landog1

    1 Rookie

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    Posted August 22nd, 2011 05:00

    Chances are that your robocopy isn't working correctly.

    Try using "emcopy" instead of "robocopy."

    Home > Support > Product and Diagnostic Tools > Celerra Tools > Windows Migration Tools > EMCOPY

    -Marty

  • pharford57

    115 Posts

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    Posted August 22nd, 2011 06:00

    hi rainer

    i was already using the /fft option and when i check the robocopy log it has only copied a fraction of the total data over (total 170gb copied 5.3gb). I have deleted the replication and setup again and stopped the robocopy job to see what happens after the FULL COPY

    if nothing is copied across when (because nothing is being updated) i will try emc copy

    as there is already data there would the below emc copy config be correct

    emcopy_V4.11.exe \\***ton\groups \\***cifs\groups *.* /o /s /c /r:1 /w:1 /f /sdd /de /purge /log+:C:\robocopy\EMCcopy\DatacopyGroups.txt

    we are doing this on 3 other celerra's with no issue so its a bit strange

    Thansk for your help

  • Rainer_EMC

    6 Operator

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    Posted August 22nd, 2011 06:00

    You should be able to identify from the data mover logs if Replicator is really doing a full sync (which I doubt).

    If not please open a service request and let EMC support investigate

    I think its more likely that your robocopy jobs are by mistake copying everything again – then Replicator being block based also has to copy that even with an incremental copy.

    The savvol increasing pretty much points to that as well

    Use emcopy instead

    It might help to set cifs.nanoroundoff or tell robocopy to only use seconds as time granularity

    Rainer

  • dynamox

    11 Legend

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    Posted August 22nd, 2011 06:00

    robocopy could be changing time stamps or something.

  • Rainer_EMC

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    Posted August 22nd, 2011 07:00

    The logs or a nas_replicate –info will clearly tell you if the current transfer is a full copy or not

    IF its really doing multiple full copies in a row for the same file system then PLEASE open a service request.

    The support forum does not get EMC support formally involved.

    Another reason for getting data more transferred than changed from the client side could be deduplicaton.

    Rainer

  • pharford57

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    Posted August 24th, 2011 02:00

    Hi Guys

        have logged a call will let you know what happens

    Paul