Hi, I am an enduser, I do not manage Storage. I know we are on version ONTAP 9.1 P5.
We have a 3-day daily snapshot. So we have a snapmirror and the three 'daily' snapshots maintained. Snaps roll off after 3 days automatically.
We have situations where a volume will reach 100%.
Sometimes when this happens, the volume will get stuck. I was told internally that "the volume will not snapmirror sync anymore due to lack of space to create the update snapshot".
When this happens, snapshots stop working. snapmirror stops. Snapshots to not roll off automatically.
After a few days passes, the .snapshot subdirectory shows the snapmirror directory and 'daily' snapshot directories which are far > 3 days old.
The action we have to take, is that human intervention is required, space must be added to this volume to allow the snap process to operate.
My question is: Why was it designed like this? in other words, why must disk space be added? Why can't the existing snapshots which is (by this time) > 3 days, just rolloff automatically? This rolloff process will (very likely) release free space to the volume.
it seems odd to me that the system cannot self-manage itself, even when disk reaches 100% usage.
please help me understand this, thank you!!