I got a question in regard to GPFS quota management with a SONAS system and HSM. I found in the forum that HSM migrated files are not counted anymore for the GPFS User Quota (stub file size = 0 bytes).
Considering regular HSM migration of older/larger files to tape would mean that the user's free space increases with HSM migration. So basically HSM migration would free up user /group space that is limited by quotas.
Now the answer which I did not find yet is what happens if files are recalled into the disk pool. I assume this is charged again to User/group quotas and suddenly those users/groups cannot create further new data since the recall filled up their quota?
In that case, what happens during the recall of a large file which exceeds the quota, will that file be completely recalled (in SONAS recall happens as root user)?
What happens during file access that would trigger recalls if the quota is already exceeded? Read error or recall (as root) and even further exceeding the quota for the owning user/group but read will work?