This should be a generic quota monitor that we can add relatively soon, in advance of moving quota to other MDS nodes, and determine how often quota limit changes are being made by admins, how many quota IDs exist on the system, how many quota RPCs are being sent per hour vs. other RPCs (to determine how much load the quota service puts on the MDS and whether distributing it across MDS nodes would help availability/performance), etc.

It would be also worthwhile to add an option to get qunit for QID. It could be add into limit_user/group/project proc files:

- id:      0
  limits:  { hard:            0, soft:            0, granted:            0, time:               0, qunit:            0 }

As well as in a separate proc files qunit_user, qunit_group and qunit_project.