[SOLVED] Ubuntu 32-bit 6.0.10 -> Ubuntu 64-bit 7.1.1 Network edition
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Thread: [SOLVED] Ubuntu 32-bit 6.0.10 -> Ubuntu 64-bit 7.1.1 Network edition

  1. #1
    Junior Member
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    [SOLVED] Ubuntu 32-bit 6.0.10 -> Ubuntu 64-bit 7.1.1 Network edition

    Hi,
    We have planned a migration from 32-bit to 64-bit for a while now because this server has outrun it's capacity. This is the case:

    Both the new and old server is hosted on same Vmware vSphere 4 platform running on Dell R710 servers and Equallogic SAS/SATA SAN. The 32-bit server has about 400 users and 400GB mailstore. We have tried some migrate tests by copying /opt/zimbra/store to the new server but this process takes about 9 hours which is a bit too long for us.

    Could ZeXtras Suite be the solution for us?

    It's also important that the migration is transparent for the users as we use network edition with a lot of outlook users which we don't want to reconfigure / resync. With that meaning the 32-bit dns / ip should be taken over by the 64-bit server.

    I would really appreciate suggestion from one of the admins here

    Thanks in advance!

  2. #2
    ZeXtras Community Manager ZeXtras Employee Cine's Avatar
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    Hello Stale,
    and welcome to the forums.

    An "Incremental Migration" is possible using ZeXtras Suite both on the Source and Destination server, see THIS post for more details (skip the part about the update of the source server). This will lead to a NO DOWNTIME migration.

    My main concern is about the users using the Zimbra Outlook Connector.
    We haven't run much internal testing on it (as ZeXtras Suite is developed and tested for/on Zimbra OSE), but I'm afraid a resync/reinitialization would be needed. As far as I know ZCO uses itemIDs as a reference for synchronizing items, and after a migration performed with ZeXtras Suite all the itemIDs will be changed (as items are not "cloned" but re-created from scratch).

    Is the "/opt/" or "/opt/zimbra/" folder on a dedicated Virtual Disk? If so, you could use the "Official" 32-to-64 bit migration guide mounting that partition on the destination server and doing a local 'mv' instead of copying the data from a VM/partition to another.. Some downtime and some risks, but completely transparent to ZCO users..
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  3. #3
    Senior Member Known ZeXtras Reseller
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    Looks like you're using ZCS NE.
    So if you want to keep support (and everything), you should follow the official migration path (linked by Cine).

    The "official" way would be :
    . upgrade current server to 6.0.14 32 bits
    . do what is on the official migration document (you'll get 6.0.14 64 bits on the new server)
    . upgrade new server to 7.1.x (7.1.3 should be out very soon)

    However, I'd rather use rsync between the server (hot then cold in order to get the smallest downtime possible) than mv or cp...
    Last edited by Klug; 09-30-2011 at 01:23 PM. Reason: Error in version number

  4. #4
    ZeXtras Community Manager ZeXtras Employee Cine's Avatar
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    Quote Originally Posted by Klug View Post
    Looks like you're using ZCS NE.
    So if you want to keep support (and everything), you should follow the official migration path (linked by Cine).

    The "official" way would be :
    . upgrade current server to 6.0.14 32 bits
    . do what is on the official migration document (you'll get 6.0.14 64 bits on the new server)
    . upgrade new server to 7.1.x (7.1.3 should be out very soon)
    This

    rsync extends the downtime a little but is more 'straightforward', while remounting the vdisk and using a 'mv' is faster but a little more complex..

    Thanks Klug!
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  5. #5
    Senior Member Known ZeXtras Reseller
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    I agree the "vdisk" method is neater when you're sure everything will go OK (and/or you can snapshot, etc).

    Using rsync is slower and will "eat" twice the space (before the old VM is deleted) but if anything goes wrong during the migration to the new VM (LDAP import fails or whatever), you just have to re-start the old VM and you're ready to go until next try.

    BTW, 7.1.3 is out 8)

  6. #6
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    Thanks for your reply guys! I will follow your advice by using the official zimbra documentation for this migration since it is NE.

    I'm sure your tools will be useful for us in other cases. Thanks!

  7. #7
    ZeXtras Community Manager ZeXtras Employee Cine's Avatar
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    Quote Originally Posted by stale View Post
    Thanks for your reply guys! I will follow your advice by using the official zimbra documentation for this migration since it is NE.

    I'm sure your tools will be useful for us in other cases. Thanks!
    You're welcome
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