Date: Tue, 26 Apr 2016 18:27:57 +0000 (UTC) From: DH <dhutch9999@yahoo.com> To: Miroslav Lachman <000.fbsd@quip.cz> Cc: <freebsd-fs@freebsd.org> Subject: Re: How to speed up slow zpool scrub? Message-ID: <381846248.2672053.1461695277122.JavaMail.yahoo@mail.yahoo.com> References: <381846248.2672053.1461695277122.JavaMail.yahoo.ref@mail.yahoo.com>
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Take a long look at the FreeNAS documentation and discussion threads - if you're not using a sufficient quantity of ECC ram with ZFS you're asking for anomalous behavior. I'm not a ZFS expert, but the documentation leads me to think inadequate system ram is certainly a consideration. FreeNAS requires a minimum of 8 GB of ECC ram when used with ZFS. David Hutchens III System Administrator -------------------------------------------- On Tue, 4/26/16, Miroslav Lachman <000.fbsd@quip.cz> wrote: Subject: Re: How to speed up slow zpool scrub? To: "DH" <dhutch9999@yahoo.com>, freebsd-fs@freebsd.org Date: Tuesday, April 26, 2016, 9:34 AM DH wrote on 04/26/2016 17:47: >> 5GB of RAM > > That seems to be an insufficient amount of system ram when employing zfs. > > Take a look at this: > > http://doc.freenas.org/9.3/freenas_intro.html#ram I know 5GB is not much these days but is memory used for scrubbing a lot? Because I am satisfied with working performance. The only concern is slow scrubbing and I am not sure that more memory helps in this case. Miroslav Lachman
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