[Bug 1883686] Re: zfs should enable autotrim

[Brian Murray]

Hello Dimitri, or anyone else affected,

Accepted ubiquity into focal-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/ubiquity/20.04.15.1 in
a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: ubiquity (Ubuntu Focal)
       Status: Triaged => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/1883686

Title:
  zfs should enable autotrim

Status in ubiquity package in Ubuntu:
  Fix Released
Status in ubiquity source package in Focal:
  Fix Committed

Bug description:
  [Impact]

   * Ubuntu enables automatic TRIM / DISCARD on all filesystems that
  support it, such that on SSD-like storage devices the performance over
  time is improved. ZFS, as setup by ubiquity, did not used to enable
  autotrim option. But it should have it enabled.

  [Test Case]

   * Complete install using zfs
   * Check that the zfs pools have autotrim feature enabled

  [Regression Potential]

   * When autotrim is in progress, i/o performance may be observed as
  stalling. However, periodic trim outweighs the benefits. Advanced
  operators may choose to disable autotrim, and execute it manually
  during regularly scheduled maintenance windows.

  [Other Info]
   
   * Shipped in groovy already

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