Bug 218449

Summary:	sysutils/boxbackup-devel: periodic script needs anticongestion sleep
Product:	Ports & Packages	Reporter:	Alan Somers <asomers>
Component:	Individual Port(s)	Assignee:	freebsd-ports-bugs (Nobody) <ports-bugs>
Status:	Closed FIXED
Severity:	Affects Only Me	CC:	portmaster, w.schwarzenfeld
Priority:	---	Flags:	portmaster: maintainer-feedback+
Version:	Latest
Hardware:	Any
OS:	Any
See Also:	https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218448

Description Alan Somers freebsd_committer

2017-04-07 03:03:41 UTC

Periodic scripts that hit external servers can cause a "thundering herd" problem, whereby many systems' periodic scripts run at the same time, and overload the server.  To prevent this, such scripts should sleep for a random amount of time before hitting the external server.

After r316432, there is a common anticongestion function to handle this.  For an example of how to use it, see
https://bugs.freebsd.org/bugzilla/attachment.cgi?id=181374&action=diff

Comment 1 Walter Schwarzenfeld 2018-01-10 00:17:27 UTC

Maintainer feedback?

Comment 2 Walter Schwarzenfeld 2018-01-10 08:09:53 UTC

svn-diff in bug # 218447.

Comment 3 Chris Hutchinson 2018-01-10 22:14:32 UTC

(In reply to w.schwarzenfeld from comment #1)
> Maintainer feedback?

Ak! I somehow missed this one. :-(

In case anyone wants to know. I'm now looking at this.

Thanks Alan, Walter!

--Chris

Comment 4 commit-hook freebsd_committer

2018-05-21 16:02:55 UTC

A commit references this bug:

Author: asomers
Date: Mon May 21 16:02:28 UTC 2018
New revision: 470559
URL: https://svnweb.freebsd.org/changeset/ports/470559

Log:
  sysutils/boxbackup*: use anticongestion sleep in the periodic job

  Use an anticongestion sleep in the periodic job to prevent the thundering
  herd problem when many systems' cron jobs fire off at once.

  PR:		218448
  PR:		218449
  Approved by:	portmaster@bsdforge.com (maintainer)

Changes:
  head/sysutils/boxbackup/Makefile
  head/sysutils/boxbackup/files/999.boxbackup.in
  head/sysutils/boxbackup-devel/Makefile
  head/sysutils/boxbackup-devel/files/999.boxbackup.in