I have a cluster that has relatively heavy IO and consequently free space on the ceph storage is constantly constrained. I'm finding myself performing fstrim on a more and more frequent interval. Is there a way to auto trim a disk for an lxc container?
is it possible to auto trim for lxc disks?
- Thread starter alexskysilk
- Start date
hi,
you can use `pct fstrim CTID` to trim the disk of a single CT. with a bash for-loop and a cronjob, you should be able to run it for all CTs.
you can use `pct fstrim CTID` to trim the disk of a single CT. with a bash for-loop and a cronjob, you should be able to run it for all CTs.
that is exactly how I'm dealing with it at the moment. was wondering if there was possible to do it automatically at mount.
you can take a look at the hookscripts/snippet feature.
from PVE Admin Guide:
Code:
11.6.7. Hookscripts
You can add a hook script to CTs with the config property hookscript.
pct set 100 -hookscript local:snippets/hookscript.pl
It will be called during various phases of the guests lifetime. For an example and documentation see the example script under /usr/share/pve-docs/examples/guest-example-hookscript.pl.Interesting suggestion. How would you suggest to structure it? it doesnt seem to fall into any of the predefined stages...
well, that would run the script once and will not impact any writes following. my thought was some kind of autodiscard but it doesnt appear that this is possible. Thanks for your thoughts 
I will continue to tweak the cron schedule.
I will continue to tweak the cron schedule.