I've been using ZFS for a while and have snapshots piling up.
I believe I can start deleting the old snapshots, but want to be doubly sure. A ZFS snapshot would be essentially similar to a git tag where it is a read-only reference to a point in time version of the repository. The active data set would be HEAD and would remain unaffected if I delete a pointer to that point in time?
So, if that is the case, then if I want to have a 30-day retention policy, I can merely look at the creation date for the snapshot and discard anything > 30 days?
Are those assumptions accurate?