[PVE-User] ZFS 'zpool trim'?

Mark Adams mark at openvs.co.uk
Wed Nov 4 18:28:06 CET 2020


Can't comment on why it's not enabled by default (or a checkbox maybe when
creating through the gui?) but just enable autotrim on your ssd pools.

zpool set autotrim=on POOLNAME

On Wed, 4 Nov 2020 at 17:22, Marco Gaiarin <gaio at sv.lnf.it> wrote:

>
> I've tried a 'zpool trim' on a SSD pool in one of my server, after
> searching about and finding:
>
>         https://openzfs.org/wiki/Features#TRIM_Support
>
> Seems to work as expected (at least: print in logs:
>
>         Nov  4 18:12:38 ino zed: eid=68 class=trim_start
> pool_guid=0x76DD565E9F8A86A8
> vdev_path=/dev/disk/by-id/ata-KINGSTON_SEDC500M480G_50026B7683586349-part3
> vdev_state=ONLINE
>         Nov  4 18:12:38 ino zed: eid=69 class=history_event
> pool_guid=0x76DD565E9F8A86A8
>         Nov  4 18:13:37 ino zed: eid=70 class=trim_finish
> pool_guid=0x76DD565E9F8A86A8
> vdev_path=/dev/disk/by-id/ata-KINGSTON_SEDC500M480G_50026B7683586349-part3
> vdev_state=ONLINE
>         Nov  4 18:13:37 ino zed: eid=71 class=history_event
> pool_guid=0x76DD565E9F8A86A8
>
> and don't destroy my disk. ;-)
>
>
> But i've tried to look into PVE wiki, or in PVE ZFS packages for some
> docs, or scripts, and found nothing.
>
>
> There's some drawbacks of trimming ZFS pools in PVE, and so it is not
> enabled by default?
> Or simply there's no way to determine a ZFS pool composed of SSD disks,
> and so it is up to the sysadmin to setup a script for trimming?
>
>
> Thanks.
>
> --
> dott. Marco Gaiarin                                     GNUPG Key ID:
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> +39-0434-842797
>
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