# [OmniOS-discuss] Highly Available ZFS

Schweiss, Chip chip at innovates.com
Mon Jun 29 20:24:34 UTC 2015

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    On Mon, Jun 29, 2015 at 1:52 PM, Michael Rasmussen <mir at miras.org> wrote:

    > Does anybody have an idea of how Nexenta does their HA-setup?
    >
    > My guess is that it must involve something with a constant snapshot of
    > the pool using zfs send combined with forced import.
    >

    Nexenta uses RSF-1 from HighAvailability.com.  It is dual servers connected
    to SAS devices.  Pools are exported either gracefully or by force on one
    host and imported on the other.   A floating IP address allows the clients
    to maintain connectivity.

    I use RSF-1 with OmniOS.   It works well, but HA in general has a steep
    learning curve and A LOT of gotchas that are not well documented anywhere.

    It took me about a year of learning until HA started actually increasing my
    storage availability.  The price of RSF-1 is well justified if you don't
    have a lot experience with HA on ZFS.   Eventually I will attempt HA
    without it, but in the mean time it is serving me well.

    -Chip

    >
    > --
    > Hilsen/Regards
    > Michael Rasmussen
    >
    > Get my public GnuPG keys:
    > michael <at> rasmussen <dot> cc
    > http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xD3C9A00E
    > mir <at> datanom <dot> net
    > http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE501F51C
    > mir <at> miras <dot> org
    > http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE3E80917
    > --------------------------------------------------------------
    > /usr/games/fortune -es says:
    > Ego sum ens omnipotens.
    >
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