Date: Wed, 27 Apr 2016 07:32:00 +0100 From: krad <kraduk@gmail.com> To: DH <dhutch9999@yahoo.com> Cc: Miroslav Lachman <000.fbsd@quip.cz>, FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: How to speed up slow zpool scrub? Message-ID: <CALfReycisbmOKoxYO7ghxzjNu1Eio=b=n51bsEYL16KFqm7M-Q@mail.gmail.com> In-Reply-To: <381846248.2672053.1461695277122.JavaMail.yahoo@mail.yahoo.com> References: <381846248.2672053.1461695277122.JavaMail.yahoo.ref@mail.yahoo.com> <381846248.2672053.1461695277122.JavaMail.yahoo@mail.yahoo.com>
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That memory requirement really depends on your work load. I have run small boxes with 2gb and zfs and they ran fine. They weren't doing filer or desktop roles though I could get away with fairly easily. Having said that I wouldn't build a machine now with less than 16gb unless it was very special circumstances. On 26 April 2016 at 19:27, DH via freebsd-fs <freebsd-fs@freebsd.org> wrote: > 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 > > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" >
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