Command zfs(something)

Commands for zfs snapshots (FreeBSD, not tested on Linux)

zpaqfranz -h zfs

• zfslist => show some snapshots
• zfspurge => create a script with zfs destroy (with -output something.sh)
• zfsadd => freeze snapshot into zpaq archive

zfslist

Show all the snapshots

zpaqfranz zfslist "*"

Show all the snapshots that END with "--5d"

zpaqfranz zfslist "*" "--5d"

Show snapshots that START with "zroot/ssd@2021" and END with "--5d"

zpaqfranz zfslist "zroot/ssd@2021" "--5d"

Redirect output to pippo.sh

zpaqfranz zfslist "zroot/ssd@2021" "--5d" -output pippo.sh

zfspurge

Prepare a script for mass-destruction of snapshots Work just as zfslist, only one example on pippo.sh

zpaqfranz zfspurge "zroot/ssd@2021" "--5d" -output pippo.sh

zfsadd

Prepare a script for multiple add(), or freeze some snapshots into an archive
NOTE: assume that "into" the snapshot name is "merged" the timestamp, as crontab script do.
headertimestampfooter

• tank/d@2021-08-12_09.00.00--7d is good
• tank/pippo@quickdelete is not

In this example we have 3 snapshots (made for example by zfSnap or whatever)
We filter the "header" (the first part, the day) and the "footer" (the last, the "--7d")

root@aserver:/tmp/47 # ./zpaqfranz zfslist "tank/d@2021-08-12" "--7d"
zpaqfranz v52.16-experimental snapshot archiver, compiled Aug 12 2021
tank/d@2021-08-12_09.00.00--7d
tank/d@2021-08-12_11.00.00--7d
tank/d@2021-08-12_13.00.00--7d

OK now we take ALL the 3 snapshots (or 3.000) into a single file, with

zpaqfranz zfsadd "tank/d@2021-08-12" "--7d" "/temporaneo/daprog2.zpaq" "scanner" -force

Please note "scanner" is an optional subfolder (just an example, if omitted get all the snapshot)
-force to make a wet run (direct).

NOTE: USE THE DOUBLE QUOTES " !!!!

Now we get the 3 snapshots into the archive, with minimum space needed, marked @ the timestamps (do you want back the snapshot @11:00:00, yes you can)

root@aserver:/tmp/47 # ./zpaqfranz i /temporaneo/daprog2.zpaq
zpaqfranz v52.16-experimental snapshot archiver, compiled Aug 12 2021
/temporaneo/daprog2.zpaq:
3 versions, 3.503 files, 36.805 fragments, 2.079.947.186 bytes (1.94 GB)

Version(s) enumerator
-------------------------------------------------------------------------
< Ver  > <  date  > < time >  < added > <removed>    <    bytes added   >
-------------------------------------------------------------------------
00000001 2021-08-12 09:00:00  +00003500 -00000000 ->        2.079.563.812
00000002 2021-08-12 11:00:00  +00000002 -00000001 ->              382.735
00000003 2021-08-12 13:00:00  +00000001 -00000002 ->                  639

It is now safe to prune the oldest snapshots (typically by crontab)