[Bug 210538] [feature request] limit number of running instances in crontab
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Date: Tue, 25 Jan 2022 22:17:08 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210538
Mikhail Teterin <mi@FreeBSD.org> changed:
What |Removed |Added
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CC| |glebius@FreeBSD.org
--- Comment #2 from Mikhail Teterin <mi@FreeBSD.org> ---
(In reply to Alan Somers from comment #1)
> This feature was added in SVN r334817.
That's related, but not quite the same thing... The commit by @glebius provides
for running "every X seconds" -- and is useful for frequent jobs.
But it'd be difficult to use even with periodic(8) -- which still does its own
locking -- because you cannot specify the desired schedule time.
The feature I envisioned was a safeguard against jobs running unusually long.
The feature implemented in r334817 is for jobs, that do usually run long...
Try rephrasing the periodic-entries in today's /etc/crontab to use Gleb's new
syntax -- so that /usr/sbin/periodic no longer needs its own locking. You
cannot...
Please, reopen this PR.
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