# [OmniOS-discuss] Omnios as a zfs storage server under esxi 5.1

Günther Alka alka at hfg-gmuend.de
Mon May 13 15:21:18 EDT 2013

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    First of all, a virtualized SAN is not a problem but a good idea on a
    lot of use cases unless you can supply the same CPU, RAM and disk
    recommendations like you would do on on real hardware. It is also not a
    problem, that you cannot do vmotion with your SAN-VM (How would you
    vmotion your physical disks??)

    But you must provide:
    - real hardware access to controller and disks (needs pass-through/vt-d)
    for your SAN VM OmniOS
    - assign enough RAM for caching (Arc-cache), the more the faster
    - be not CPU limited

    If you need a ZIL or better disable sync write depends on use case.
    If you build an All-In-One (ESXi with virtualized SAN), all your guests
    go down together with your SAN,
    so mostly a ZIL costs money and performance but cannot improve security.

    You should also trythe ESXI highspeed VMXnet3 network drivers (unless
    you find problems with them like some others)
    If you intend to use compression, use LZ4 (with newest OmnoOS stable
    with bugfixes for LZ4)

    Have you read my manuals (hope they are helpful)?
    http://www.napp-it.org/doc/downloads/all-in-one.pdf and
    http://napp-it.org/doc/ESXi-OmniOS_Installation_HOWTO_en.pdf

    Gea

    On 13.05.2013 20:55, C. L. Martinez wrote:
    > Hi all,
    >
    > Next month, we need to deploy an omnios virtual machine to act as
    > storage server under esxi 5.1. We can not use bare metal server, and I
    > know that is a problem.
    >
    > We are thinking in disable zil. Is it recommended when omnios is
    > installed as a vm?? And we can not use pci passthrough esxi feature
    > due to vmotion and HA features enabled in these esxi servers.
    >
    > Any recommendations about how to configure this vm?
    >
    > At first stage we can allocate 8 gb of ram and 4 vcpus. And wr need to
    > manage 5 tb of data with snapshots and maybr compression in certain
    > zfs volumes.
    >
    > Thanks
    >
    >
    > _______________________________________________
    > OmniOS-discuss mailing list
    > OmniOS-discuss at lists.omniti.com
    > http://lists.omniti.com/mailman/listinfo/omnios-discuss

    --

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