** Changed in: zsys (Ubuntu)
Assignee: (unassigned) => Didier Roche (didrocks)
** Also affects: zsys (Ubuntu Focal)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1881540
Title:
Enable trim support for ugprading users
Status in zsys package in Ubuntu:
Fix Released
Status in zsys source package in Focal:
New
Bug description:
[Impact]
* Autotrim (a fresh feature in 0.8) hasn’t been enabled on purpose on new
ZFS installation.
* Now that we personnaly ran it on our SSD for some weeks, we have been able
to experiement it and test its robustness (empirically)
* We need to enable it so that users with SSD don’t suffer from performance
degration over time, as in traditional ubuntu which has trim supported.
[Test Case]
1. zpool status -t <pool> -> the pool was never trim.
2. zpool get autotrim <pool> -> should be off
3. Install ZSys update
4. zpool status -t <pool> -> trimming is done or in progress.
5. zpool get autotrim <pool> -> should be on
[Regression Potential]
* The upgrade set autotrim on both rpool and bpool (and only on them) to not
impact other pools.
* As autotrim is only for new write, we issue a manual zpool trim commands
over them, which is ran in background by the kernel zfs module. The commands
exits immediately.
* We also tested installations without bpool.
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