# [OmniOS-discuss] High Availability storage with ZFS

Linda Kateley lkateley at kateley.com
Tue Jan 6 17:48:22 UTC 2015

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    I thought it was stmsboot and mpathadm on omni? If you are just looking
    for multipathing to disk? Haven't tried on omni.

    On 1/6/15 11:28 AM, Schweiss, Chip wrote:
    > On Tue, Jan 6, 2015 at 5:16 AM, Filip Marvan <filip.marvan at aira.cz
    > <mailto:filip.marvan at aira.cz>> wrote:
    >
    >     Hi
    >
    >     as few guys before, I'm thinking again about High Availability
    >     storage with ZFS. I know, that there is great commercial RSF-1,
    >     but that's quite expensive for my needs.
    >
    >     I know, that Sašo did a great job about that on his blog
    >     http://zfs-create.blogspot.cz but I never found the way, how to
    >     successfully configure that on current OmniOS versions.
    >
    >     So I'm thinking about something more simple. Arrange two LUNs from
    >     two OmniOS ZFS storages in one software mirror through
    >     fibrechannel. Arrange that mirror in client, for example mdadm in
    >     Linux. I know, that it will have performance affect and I will
    >     lost some ZFS advantages, but I still can use snapshots, backups
    >     with send/receive and some other interesting ZFS things, so it
    >     could be usable for some projects.
    >
    >     Is there anyone, who tried that before? Any eperience with that?
    >
    >
    > While this sounds technically possible, it is not HA. Your client is
    > the single point of failure.   I would wager that mdadm would create
    > more availability issues than it would be solving.
    >
    > I run RSF-1 and HA is still hard to achieve.   I don't think I have
    > gained any additional up-time overcoming failures, but it definitely
    > helps with planned maintenance.   Unfortunately, there are still too
    > many ways a zfs pool can fail that having a second server connected
    > does not help.
    >
    > -Chip
    >
    >     Thank you,
    >
    >     Filip Marvan
    >
    >
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