Date: Mon, 13 Feb 2017 08:54:20 -0700 From: Alan Somers <asomers@freebsd.org> To: Cy Schubert <Cy.Schubert@komquats.com> Cc: scrappy@freebsd.org, Brian Somers <brian@freebsd.org>, freebsd-bugzilla@ayaken.net, Cy Schubert <cy@freebsd.org>, pkg@freebsd.org Subject: Re: Bug 217055 - Consolidate random sleeps in periodic scripts Message-ID: <CAOtMX2jj_GCKjWW8CpapHutwH7OY00WnSWQS5VOuruv6i9Avqw@mail.gmail.com> In-Reply-To: <201702130701.v1D71d4Y056355@slippy.cwsent.com> References: <asomers@freebsd.org> <CAOtMX2gJRuKKwwcHW5ZxTTZAm5Tmb7cVQ1SZEjwnuingYnO-Zg@mail.gmail.com> <201702130701.v1D71d4Y056355@slippy.cwsent.com>
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On Mon, Feb 13, 2017 at 12:01 AM, Cy Schubert <Cy.Schubert@komquats.com> wrote: > In message <CAOtMX2gJRuKKwwcHW5ZxTTZAm5Tmb7cVQ1SZEjwnuingYnO-Zg@mail.gmail.c > om> > , Alan Somers writes: >> I propose that we remove the various anti-congestion sleeps from >> different periodic scripts, and add a single anti-congestion sleep to >> the very beginning. Does this sound like a good idea to all of you? >> >> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217055 > > I think the problem with the sleeps is simply the sleeps. My original plan > to put my sleep/fetch in the background was shot down by some who thought > it wasn't simple enough. > > Secondly, we don't need sleeps every boot. Ntpd for example only needs a > sleep twice a year max to fetch a new leapfile so, to have a sleep every > boot would be annoying. > > The best solution to replace sleeps would be to put a list of files:URLs > into a queue to be fetched by fetcher script which would fetch only needed > files that boot (or in the case of ntp via periodic.conf twice a year). > > A single script with a queue of files to fetch with one anti-congestion > sleep, preferably in the background. > > NTP, btw can (will) use the leapfile in /etc/ntp until a fresher copy is > fetched. > > Let's remove all fetching functions from the various rc scripts and queue > them up early in a fetcher rc script, preferably in the background if at > all possible. > > > -- > Cheers, > Cy Schubert <Cy.Schubert@cschubert.com> > FreeBSD UNIX: <cy@FreeBSD.org> Web: http://www.FreeBSD.org > > The need of the many outweighs the greed of the few. Unfortunately that won't work, Cy. Some scripts may need to dynamically determine what files to fetch, in a way that we can't do in a single separate fetcher script. Worse, some scripts, like 300.statistics from sysutils/bsdstats, need to _post_ a URL, not get one. -Alan
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