I am searching the web for any man pages or at least a list of tunable properties of zfs-auto-snapshot, but I am blind probably? Can You add few words, or a link, please?
I found a README, but I can't understand the way I could change or even read the values mentioned.
So, trying a simple task: How to inc or decrease number of kept monthly snapsots?(having disk space in mind).
sun uses svcadm or time-slider tools which seem nonexistant under ubuntu, am I right?
svccfg -s svc:/system/filesystem/zfs/auto-snapshot:frequent setprop zfs/period = 30
svccfg -s svc:/system/filesystem/zfs/auto-snapshot:frequent refresh
svcadm restart svc:/system/filesystem/zfs/auto-snapshot:frequent
I hope this post is relevant here, as the defaults are great, but perhaps many users with "almost full" pools would be afraid of running out of diskspace.
EDIT: I had another issue with zfs-auto-snapshot.
It created snaps at cca 8:00am, approximately at start of working day. What a bad idea, assuming that destroy of outdated snaps which could be very intensive operation and take quite a long time, will occur at that time too.
I see that as a risk of driving the system unusable at the worst time of a day.
It seems to be just an entry in /etc/cron.daily (weekly, monthly), so the change of anacron line for daily (or whatever) jobs in crontab, should suffice.
I am missing the mention about this in readme.