ONTAP 9.4, AFF300, autogrow/shrink enabled across the board, autodelete enabled on iSCSI LUN serving volumes only.
To reserve, or to not reserve?
Customer historically did 20% snap reserve on all volumes. I can see a snap reserve if there is an SLA which says a minimum number of snapshots must be retained. I enforce quotas on all my shares, so running out of space in the volume is not an issue.
It doesn't seem like setting the snap reserve is doing anything for me. Quotas, volume efficiency, autogrow/shrink, and autodelete should ensure I have adequate space for snapshots. At worst, they captivate storage.
Comments?
TIA