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Thread: Do you have some feedback about Zimbra on iscsi storage (particulary Equallogic) ?

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    allinbox is offline Starter Member
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    Default Do you have some feedback about Zimbra on iscsi storage (particulary Equallogic) ?

    I'm looking for some information to help me in sizing and best practices , Raid Level, kind of disk SATA or SAS ?

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    Klug's Avatar
    Klug is offline Moderator
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    I'll answer here (and not on LinkedIn).

    It depends on many factors : number of accounts (provisionned & active), number of mails sent/received, "bare metal" or VM, etc...

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    dave_kempe is offline Partner (VAR/HSP)
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    yeah mailbox size and location of backups is also things you need to consider in sizing and choosing speed. we use iscsi and find its fine. Linux <-> linux only though.
    http://www.solutionsfirst.com.au/hosting/zimbra/
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    Klug's Avatar
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    One of their key features of Equallogic SANs, when you have several of them (SATA, SAS, etc) is the automagical balance of the data on different type of volume/disks depending on data usage.

    This feature is directly integrated in ZCS, it's the HSM.

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    Hatrix is offline Translation Moderator
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    Whatever you do, make sure you have iSCSI initiator configured to queue if an error happens (you need multipath installed for that), I did not configure it at first and when you have a minor problem (network cable gets loose, whatever) you'l have to reinitiate the connection, which can lead to all sorts of troubles ...

    in my case (as i use KVM machines which resides as well on the iSCSI, and inside the zimbra virtual machine another iSCSI connection to the mailstore) i had to reboot the KVM Host because reconnection did not work, or, reconnection did work, but the KVM's could not work anymore, they where frozen with I/O Errors.

    So, make sure to test possible failures!

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