# [OmniOS-discuss] Active-Active vSphere

Rune Tipsmark rt at steait.net
Fri Nov 28 14:34:56 UTC 2014

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    Okay, i noticed alua support is not enabled per default on omnios. How do i enable that?

    > On Nov 27, 2014, at 11:29 PM, Saso Kiselkov <skiselkov.ml at gmail.com> wrote:
    >
    >> On 11/27/14 11:40 PM, Rune Tipsmark wrote:
    >> so to simplify, say we have one esxi host that has two FC ports, one omnios/zfs server has two FC ports as well.
    >> Should it run ALUA with Round Robin instead of the default ALUA with MRU (most recently used). RR has traffic on both paths (says Active I/O on both) and MRU only on one...
    >
    > Ah, now this is a different story altogether, if it's just one storage
    > head node. In that case, Round-Robin will of course work exactly as
    > expected, be it over FC or iSCSI and any number of links. The important
    > thing is that the backing ZFS pool is only imported on one machine.
    >
    > Cheers,
    > --
    > Saso

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