[Bug 1554848] Re: Please randomise automatic updates over a longer period

[Haw Loeung]

Any chance of having something similar ported to releases before Xenial
(Trusty and friends)?

We're getting alerts for our archive mirrors as well as our cloud
mirrors whenever there's USNs for the Linux kernel, Firefox, and a
couple of other large packages.

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https://bugs.launchpad.net/bugs/1554848

Title:
  Please randomise automatic updates over a longer period

Status in apt package in Ubuntu:
  Fix Released
Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in apt source package in Trusty:
  Confirmed
Status in unattended-upgrades source package in Trusty:
  Confirmed
Status in apt source package in Xenial:
  Fix Released
Status in unattended-upgrades source package in Xenial:
  Fix Released

Bug description:
  Load on the main Ubuntu archive servers is rather peakish, and tends
  to create a traffic peak on our Internet links at fairly regular times
  each day, preventing customers from accessing the archive.  This
  impacts the cloud archive mirrors using the ubuntu-repository-cache
  charm also, because they are hitting a squid cache which is backed by
  the main archive.  This effect will be even more pronounced under the
  recently-announced automatic update policy for xenial.

  One solution which would alleviate this to some extent would be to
  spread the load over a longer period by increasing the random sleep
  time in the daily update script from 30 minutes to, say, 1-2 hours.

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