4 ms·

Opensuse Tumbleweed comes with snapper which works with btrfs in a similar fashion and /home is not included in the snapshot by default. For your use case too y

by dizhn 3y ago

Opensuse Tumbleweed comes with snapper which works with btrfs in a similar fashion and /home is not included in the snapshot by default. For your use case too you should exclude /home from your apt triggered snapshots and set a separate one for it. I had scheduled snapshots for my /home at one point but since it's a very actively used directory (downloading isos, games then deleting them) I had similar problems to yours. I guess we could both also have a dedicated separate directory for those short lived huge files, which don't need a snapshot anyway.

Dylan16807 3y ago
> I had scheduled snapshots for my /home at one point but since it's a very actively used directory (downloading isos, games then deleting them) I had similar problems to yours. What kind of schedule was it? I feel like the low-impact alternative to no snapshots at all is daily snapshots for half a week to a week, and maybe some n-hourly snapshots that last a day or two. Which I would not expect to use up very much space.
- dizhn 3y ago
  It was very frequent (around every 5 minutes) because what I was trying to get was a failsafe in case I delete or otherwise mess up a file I was currently working on. It happened exactly once since I disabled snapshots of /home and I was able to recover it from the terminal's scrollback buffer of all places. :) As far as I know btrfs does get slower as the number of snapshots increase. Not sure about zfs in that regard. Your plan does sound sensible. I have a feeling you could make the snapshots even more frequent without any ill effects.
totetsu 3y ago
I found cat /etc/apt/apt.conf.d/90_zsys_system_autosnapshot // Takes a snapshot of the system before package changes. DPkg::Pre-Invoke {"[ -x /usr/libexec/zsys-system-autosnapshot ] && /usr/libexec/zsys-system-autosnapshot snapshot || true";}; // Update our bootloader to list the new snapshot after the update is done to not block the critical path DPkg::Post-Invoke {"[ -x /usr/libexec/zsys-system-autosnapshot ] && /usr/libexec/zsys-system-autosnapshot update-menu || true";}; but how would I get this to not snapshot , say /home/Downloads .. make that its own zpool?
- dizhn 3y ago
  Dataset should be enough I think. Not zpool. Hard to be sure without knowing what that script does.

by dizhn 3y ago

Dylan16807 3y ago

> I had scheduled snapshots for my /home at one point but since it's a very actively used directory (downloading isos, games then deleting them) I had similar problems to yours. What kind of schedule was it? I feel like the low-impact alternative to no snapshots at all is daily snapshots for half a week to a week, and maybe some n-hourly snapshots that last a day or two. Which I would not expect to use up very much space.

dizhn 3y ago
It was very frequent (around every 5 minutes) because what I was trying to get was a failsafe in case I delete or otherwise mess up a file I was currently working on. It happened exactly once since I disabled snapshots of /home and I was able to recover it from the terminal's scrollback buffer of all places. :) As far as I know btrfs does get slower as the number of snapshots increase. Not sure about zfs in that regard. Your plan does sound sensible. I have a feeling you could make the snapshots even more frequent without any ill effects.

totetsu 3y ago

I found cat /etc/apt/apt.conf.d/90_zsys_system_autosnapshot // Takes a snapshot of the system before package changes. DPkg::Pre-Invoke {"[ -x /usr/libexec/zsys-system-autosnapshot ] && /usr/libexec/zsys-system-autosnapshot snapshot || true";}; // Update our bootloader to list the new snapshot after the update is done to not block the critical path DPkg::Post-Invoke {"[ -x /usr/libexec/zsys-system-autosnapshot ] && /usr/libexec/zsys-system-autosnapshot update-menu || true";}; but how would I get this to not snapshot , say /home/Downloads .. make that its own zpool?

dizhn 3y ago
Dataset should be enough I think. Not zpool. Hard to be sure without knowing what that script does.