# [OmniOS-discuss] Slow scrub on SSD-only pool

Stephan Budach stephan.budach at JVM.DE
Fri Apr 22 17:45:51 UTC 2016

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    Am 22.04.16 um 19:28 schrieb Dan McDonald:
    >> On Apr 22, 2016, at 1:13 PM, Richard Elling <richard.elling at richardelling.com> wrote:
    >>
    >> If you're running Solaris 11 or pre-2015 OmniOS, then the old write throttle is impossible
    >> to control and you'll chase your tail trying to balance scrubs/resilvers against any other
    >> workload. From a control theory perspective, it is unstable.
    > pre-2015 can be clarified a bit:  r151014 and later has the modern ZFS write throttle.  Now I know that Stephen is running later versions of OmniOS, so you can be guaranteed it's the modern write-throttle.
    >
    > Furthermore, anyone running any OmniOS EARLIER than r151014 is not supportable, and any pre-014 release is not supported.
    >
    > Dan
    >
    …and I am actually fine with the new controls/tunables, so there's
    aboslutely no fuss here. ;) Plus, I actually understood, how both work,
    which is a plus…

    Cheers,
    Stephan

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