Date: Thu, 10 Aug 2000 14:46:28 +0100 From: Brian Somers <brian@Awfulhak.org> To: brian@FreeBSD.ORG Cc: brett@lariat.org, freebsd-bugs@FreeBSD.ORG, brian@Awfulhak.org Subject: Re: conf/20498: All FreeBSD systems trigger massive late-night activity at the same times Message-ID: <200008101346.OAA04696@hak.lan.Awfulhak.org> In-Reply-To: Message from <brian@FreeBSD.ORG> of "Thu, 10 Aug 2000 04:23:41 PDT." <200008101123.EAA99038@freefall.freebsd.org>
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> Synopsis: All FreeBSD systems trigger massive late-night activity at the same times
>
> State-Changed-From-To: closed->open
> State-Changed-By: brian
> State-Changed-When: Thu Aug 10 04:21:46 PDT 2000
> State-Changed-Why:
> I think it might be nice to have a mechanism whereby cron runs
> maybe-periodic every 15 minutes between (say) 2:00 and 23:00. The
> maybe-periodic script checks a touch file that indicates when the
> last such periodic actually ran (say /var/db/periodic-{dai,week,month}ly.run.
> If the file has a date of yesterday or before (or this day last week
> or month depending on the periodic argument), the script picks a
> random number between 1 and 24 (or 1 and 7 or 1 and 31) . If the
> file is more than that number of hours (or days) old, the touch-file
> is re-touched and the periodic run is invoked.
>
> This resolves the random-start-time issue, and also handles systems
> that are shut down every night.
>
> I'll implement this if nobody objects.
With a smarter algorithm (that actually works) and a default of the
same behaviour as we see now.
--
Brian <brian@Awfulhak.org> <brian@[uk.]FreeBSD.org>
<http://www.Awfulhak.org>; <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !
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