# [OmniOS-discuss] High Availability storage with ZFS

Ian Kaufman ikaufman at eng.ucsd.edu
Tue Jan 6 17:12:13 UTC 2015

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    Hi all,

    I have modified and played with some simple scripts to create my own
    heartbeat, STONITH, failover set up. I currently have a pair of
    redundant systems, each one having redundant heads connected to shared
    JBODs, with the data replicated to the backup system via ZFS
    send/recv. I am going to do further testing, as this is a new set up,
    but I had it down to a 10 second failover without too much hassle
    between heads at one point, and the delta for the data on the backup
    system was down to about 30 minutes at one point.

    Ian

    On Tue, Jan 6, 2015 at 7:19 AM, Stephan Budach <stephan.budach at jvm.de> wrote:
    > Am 06.01.15 um 14:08 schrieb Filip Marvan:
    >
    > Hi Vincenzo,
    >
    >
    >
    > your solution is much more better, so thank you very much for your notes. I
    > will try that too!
    >
    >
    >
    > Filip
    >
    >
    >
    >
    >
    > From: Vincenzo Pii [mailto:piiv at zhaw.ch]
    > Sent: Tuesday, January 06, 2015 1:54 PM
    > To: Filip Marvan
    > Cc: omnios-discuss at lists.omniti.com
    > Subject: Re: [OmniOS-discuss] High Availability storage with ZFS
    >
    >
    >
    > 2015-01-06 12:16 GMT+01:00 Filip Marvan <filip.marvan at aira.cz>:
    >
    > 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?
    >
    >
    >
    > Thank you,
    >
    >
    >
    > Filip Marvan
    >
    >
    >
    >
    >
    >
    > Hi Filip,
    >
    >
    >
    > I am not directly answering your question, but I've gone through the
    > configuration of HA (with pacemaker) on OmniOS in the past months and
    > collected all my notes here:
    > http://blog.zhaw.ch/icclab/use-pacemaker-and-corosync-on-illumos-omnios-to-run-a-ha-activepassive-cluster/,
    > maybe it can be useful for you.
    >
    >
    >
    > In my experience, running pacemaker correctly on OmniOS is just the tip of
    > the iceberg, then comes the implementation/configuration of the resource
    > agents (and the cluster itself!).
    >
    > If this way is worth it, rather than a quicker and more custom solution,
    > depends on the long term plans :).
    >
    >
    >
    > Best regards,
    >
    > Vincenzo.
    >
    >
    >
    > Have you looked at the setup that Saso Kiselkov describes in his blog here:
    > http://zfs-create.blogspot.nl/2013/06/building-zfs-storage-appliance-part-1.html
    > It seems to cover most of a pacemaker setup, including the resource agents.
    >
    >
    > Cheers,
    > budy
    >
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    >

    --
    Ian Kaufman
    Research Systems Administrator
    UC San Diego, Jacobs School of Engineering ikaufman AT ucsd DOT edu

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