#ZFS retention has two new properties to offer new configuration choices in #OracleSolaris 11.4.63.
The new "retention.policy.onexpiry" property allows specifying what happens at the end of the retention period - automatic deletion, continued hold, or being left to allow manual deletion.
The new "retention.policy.changeacl" allows changing non-write permissions/ACLs on retained files, for sites who need to be able to change who can read the file during the retention period.