Date: Mon, 3 Aug 2020 20:05:01 +0200 From: Peter Eriksson <pen@lysator.liu.se> To: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: zfs scrub enable by default Message-ID: <0BF85C14-5671-4779-928A-34C5FD3B82C1@lysator.liu.se> In-Reply-To: <20200803121444.J57111@mulder.mintsol.com> References: <cca34d1a-1892-41ec-ce45-84865100c6e1@FreeBSD.org> <20200803121444.J57111@mulder.mintsol.com>
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On our pretty big ZFS fileservers (home directories) we run scrubs manually but every now and then - but I have a script that pauses the scrubs during “prime time” since a full scrub run takes a day or so... Crontab: # zpool-scrub-pause 0 8 * * 1-5 /sbin/zpool-scrub pause all >/var/liu/log/zpool-scrub-pause 2>&1 # zpool-scrub-resume 0 21 * * 1-5 /sbin/zpool-scrub resume all >/var/liu/log/zpool-scrub-resume 2>&1 The script can be downloaded from: https://www.grebo.net/~peter/zfs/ <https://www.grebo.net/~peter/zfs/>; Perhaps something similar could be used with configurable “prime time hours”)? - Peter > On 3 Aug 2020, at 18:35, Walter Cramer <wfc@mintsol.com> wrote: > > Assuming a fairly-idle system, or one with a tiny zpool - scrubs from 'periodic daily' can work fine. > > In cases where that assumption is false - the resources consumed by an hours-long scrub, slowing down a system which people expect to be "as responsive as it usually it"... > > Our defaults should try to minimize the nasty surprises. > > -Walter > > > On Mon, 3 Aug 2020, Steve Wills wrote: > >> Hi, >> >> I wonder why we don't enable zfs periodic scrub by default? >> >> https://svnweb.freebsd.org/base/head/usr.sbin/periodic/periodic.conf?view=markup#l162 >> >> Anyone happen to know? >> >> Thanks, >> Steve >> >> _______________________________________________ >> 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" >> > _______________________________________________ > 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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