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 <[email protected] <mailto:[email protected]>> 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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