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Thread: 650,000 Mailbox Migration Qmail-LDAP 2 Zimbra NE

  1. #11
    pointer is offline Junior Member
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    Default Migration info

    bonoboslr,

    Thanks for posting the migration info. I'm getting ready to start a similar--albeit smaller--migration with courier on the old system.

    /mike

  2. #12
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    bonoboslr is offline Special Member
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    Good luck. Hope all goes well!

  3. #13
    fernandoflorez is offline Project Contributor
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    Quote Originally Posted by bonoboslr View Post
    $ zmlicense -p
    AccountsLimit=650000
    OMG! I fell off my chair!

    I would love to see pics from your servers. First time i have met someone with that amount of mailboxes.

    Congratz!

  4. #14
    bonoboslr's Avatar
    bonoboslr is offline Special Member
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    Ok. Update - as you can see from the numbers below we are well, well into the migration. Had some issues initially with our load balanced MTAs. SpamAssassin is dog slow... Anyway, because we have spam wall protecting our mail servers, we turned antispam off.

    We also decided to make a slight design change - instead of having a cluster of load balanced MTAs we decided to split the functionalitys of the MTAs. Half would perform relay functionality and the other half will performing inbound MX. This overcomes postix's problem of only having 1 queue.

    Over 1/5 of our users have been migrated and we (at the moment) are not even requiring more than 1 MTA. OK, it does have 12Gb RAM and 8 Cores!
    But we will be adding to them on Monday.

    If anyone does considering using the external data source as a method of migrating mailbox data -
    zimbraScheduledTaskNumThreads
    should be tuned to what is required.

    zimbra_mail=# select count(*) from users;
    count
    --------
    119160

  5. #15
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    Migration - Week1 Bonobo’s Blog

    For those that have an interest.

  6. #16
    uxbod's Avatar
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    Will be keeping an eye on your blog ... very interesting indeed.

  7. #17
    bonoboslr's Avatar
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    Bonobo’s Blog

    Some pretty graphs...
    Last edited by bonoboslr; 02-22-2009 at 10:55 AM.

  8. #18
    flums is offline Trained Alumni
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    Really looking forward to se the end of this migration and som stats. Would you consider sharing zmstats?

  9. #19
    cmargena is offline Active Member
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    Quote Originally Posted by bonoboslr View Post
    We are using SAN storage for index,redolog,logs,db/data,store,secondary_store. We have opted for maximum spindles as possible to increase performance. IOPs I will be able to give a better indication when we are in full swing. It will be negligible just now as we do not have that many users migrated across and they are all still using pop. Our intention is to change that though.

    I cannot see us deploying more than 4 of each proxies or SMTP servers sun galaxy 4450s are phenominal beasts. Lots of disks, lots of cores, lots of RAM!!

    zimbra_mail=# select count(*) from users;
    count
    -------
    54423

    Still quite a few!
    Do you have any detail on SAN disks, Are they SCSI or SATA?

  10. #20
    ab5602 is offline Project Contributor
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    Wow, congrats on the successes so far bonoboslr!

    -Rob

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