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Thread: Uber Setup

  1. #1
    bonoboslr's Avatar
    bonoboslr is offline Special Member
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    Default Uber Setup

    Ok. Heres how were are bustin it. We have 4 mail stores each with the capacity for 250,000 users. We need availability, so each mailstore is a cluster - but here is the funky business. We only have 5 physical machines for the stores.

    All 5 machines are are san attached and utilize a clustered file system (GFS). On top of the clustered file system we have 8 virtual machines - zim1-1, zim1-2, zim2-1 and so on. Each virtual machine is a clustered service on the physical cluster so live migration is possible of any of the VMs to any of the 5 physical machines.

    zim1-1 & zim1-2 are clustered together and run a clustered zimbra service mail1
    zim1-2 & zim2-2 are also clustered together and run clustered zimbra service mail2

    and so on.

    Each mail store has it's own set of luns on the SAN for index,logs,redologs,db/data,store,secondary that are exposed to the physical machines and are exposed to the VMs as physical devices.

    In front of the mail stores we have proxy/MTAs.

    The bottom line is we saved a shed load on having to only purchase 5 machines instead of 8 for the cluster, yet have the same availability and more management. It is, administratively, a bit complex - but it is working.

    If anyone is interested in this setup we will be putting together a white paper in the very near future.

  2. #2
    dijichi2 is offline OpenSource Builder & Moderator
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    do you have active-active redundancy for the stores and frontends? or do you have active-standby on the frontends and rely on the SAN for store resilience?

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    bonoboslr's Avatar
    bonoboslr is offline Special Member
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    The MTA/Proxies are behind a network load balancer which removes devices out of service if they are no longer responsive. The stores are active-passive. One vm (eg zim1-1) is the active store with the san storage attached and in case of a failvoer, the service and shared storage fails over to the other vm - zim1-2

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    bdial's Avatar
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    are you using vmware esx? what kind of san?

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    uxbod's Avatar
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    I would guess from the profile they are running Xen to provide the VM capabilities. If so which version 3.2.1 or 3.3.0 ?

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    bonoboslr's Avatar
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    I am using the version of xen that is shipped with RHEL5 - 3.0.3

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