Hi,
yesterday afternoon I activated the shown task for automatic snapshots of my main Pool "datapool" (yes, silly name.
). Its the only snapshot-task.
So, the system should take snapshots every three hours (from the Pool itself and the child datasets), but only if there are changes.
But when I checked today I saw a lot of snapshots that show some data change, but are taken at a time (this night) when definitely no one changed any data (the datasets are shared via SMB).
Example for the "Media"- dataset that really did not change at all since yesterday.
The last snapshot was at 03:00 this night (no snapshots are created at 06:00, 09:00, .... so, this happens not always)
And when I try to show the diff with
zfs diff datapool/Media@auto-2020-12-12_00-00 datapool/Media@auto-2020-12-12_03-00
nothing is shown (no output at all).
Why are those snapshots taken when there was no change in the dataset and what am I doing wrong, or is this a bug in TrueNAS-12.0-U1?
Thanks alot.
P.S. When I do a "zfs diff" from snapshots where the data in the dataset was changed, the zfs diff shows the changes. So the "zfs diff" itself works.
yesterday afternoon I activated the shown task for automatic snapshots of my main Pool "datapool" (yes, silly name.
So, the system should take snapshots every three hours (from the Pool itself and the child datasets), but only if there are changes.
But when I checked today I saw a lot of snapshots that show some data change, but are taken at a time (this night) when definitely no one changed any data (the datasets are shared via SMB).
Example for the "Media"- dataset that really did not change at all since yesterday.
Code:
zfs list -t snapshot|grep Media datapool/Media@auto-2020-12-11_15-00 341K - 6.03G - datapool/Media@auto-2020-12-12_00-00 114K - 6.03G - datapool/Media@auto-2020-12-12_03-00 114K - 6.03G -
The last snapshot was at 03:00 this night (no snapshots are created at 06:00, 09:00, .... so, this happens not always)
And when I try to show the diff with
zfs diff datapool/Media@auto-2020-12-12_00-00 datapool/Media@auto-2020-12-12_03-00
nothing is shown (no output at all).
Why are those snapshots taken when there was no change in the dataset and what am I doing wrong, or is this a bug in TrueNAS-12.0-U1?
Thanks alot.
P.S. When I do a "zfs diff" from snapshots where the data in the dataset was changed, the zfs diff shows the changes. So the "zfs diff" itself works.