Date: Wed, 15 Feb 2017 14:17:34 +0100 From: "Martin S. Weber" <Ephaeton@gmx.net> To: Alan Somers <asomers@freebsd.org> Cc: Cy Schubert <Cy.Schubert@komquats.com>, scrappy@freebsd.org, Brian Somers <brian@freebsd.org>, Cy Schubert <cy@freebsd.org>, pkg@freebsd.org, Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?= <des@freebsd.org> Subject: Re: Bug 217055 - Consolidate random sleeps in periodic scripts Message-ID: <20170215131734.GA2129@hephaistos.local> In-Reply-To: <CAOtMX2ic=y_ZHCKRg3OF_aGWdKXbPv0UkVze3APW=7LWO9W1xg@mail.gmail.com> References: <asomers@freebsd.org> <CAOtMX2jr6=-fmzni537JbzRv6f9YvsrHHPgnt5HnNLjLgjd5OQ@mail.gmail.com> <201702140647.v1E6lVd8078946@slippy.cwsent.com> <20170214113643.GA3593@hephaistos.local> <CAOtMX2ic=y_ZHCKRg3OF_aGWdKXbPv0UkVze3APW=7LWO9W1xg@mail.gmail.com>
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On 2017-02-14 09:29:47, Alan Somers wrote: > Ok, the consensus opinion seems to be that: > 1) A single sleep would be better than 3 sleeps > 2) Periodic shouldn't sleep if no script requires it > 3) Nothing should be backgrounded > 4) Periodic shouldn't sleep when run interactively. > > I can achieve all of this by putting a common sleep function in > /etc/defaults/periodic.conf. Some passing of environment variables > will be required. I'll put everyone on the code review when it's > ready. You can achieve all of this by teaching crond to introduce the random jitter itself as well and keep the whole rc.d scripts sleep-less. This would automatically fix periodic incantations from the command lines. Then in the system crontab (no, not root's crontab as is wrongly documented), just add the JITTER=3600 or equivalent to vary calls by up to an hour (or whatever mileage you prefer) and we're all happy ;) Regards, -Martin
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