Schedule trim (fstrim) job on Hosts/VMs

[TomSawyer]

Do I need to schedule fstrim for SSD disks (or even HDD?..) on Proxmox 6.2 ?

And if I do, how exactly do I schedule such a job? I've searched online but didn't find anything except for scheduling backups...

Thank you,

 

[oguz]

hi,

fstrim.timer executes once a week automatically.

 

[TomSawyer]

hi,

fstrim.timer executes once a week automatically.

Thank you but where exactly do I write this command? In the Shell for each VM and Host?

 

[oguz]

you don't need to run any command, it executes automatically every week.

if you want to run it manually, you can run fstrim -av on the host

 

[TomSawyer]

I understand...Thank you.

Besides the host does it run automatically for all the VMs on it and storage/directories as well?

 

[oguz]

Besides the host does it run automatically for all the VMs on it and storage/directories as well?

fstrim -a is shorthand for fstrim --all. it will trim all the mounted filesystems that support discarding.

you can also run it separately in the VMs from the shell

 

[urnash]

Я вижу, что fstrim по умолчанию не включен по таймеру.
Мне пришлось его вручную включить
Читайте https://www.linux.org.ru/forum/admin/15302559

 

[EmilioMoreno]

Hi all.
as Urnash mention the fstrim.timer service is not running in a default installation. no matter if it is suscription or community edition. Is it safe to activate it?

systemctl list-timers -all
systemctl start fstrim.timer
systemctl start fstrim.service

 

[janssensm]

Should be safe to activate, it's not something proxmox specific. Debian also has fstrim setup like that.
you can enable by running:
systemctl enable fstrim.timer

The timer triggers the service, the service isn't running all the time.
You can trigger it one time by running:
systemctl start fstrim.service

You can monitor by running:
journalctl -u fstrim.timer
and
journalctl -u fstrim.service