Schedule trim (fstrim) job on Hosts/VMs

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TomSawyer

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Aug 24, 2020
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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,
 
hi,

fstrim.timer executes once a week automatically.
 
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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
 
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I understand...Thank you.

Besides the host does it run automatically for all the VMs on it and storage/directories as well?
 
TomSawyer said:
Besides the host does it run automatically for all the VMs on it and storage/directories as well?
Click to expand...

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
 
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
 
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
 
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