Comment 8 for bug 2056193

If you connect to Mongo...

unitstates - ID has the model UUID and unit ID, for example:

db.unitstates.find({"_id" : "bdd12a44-2fdb-4596-87e5-a2fe851f36de:u#ubuntu/0#charm"}).pretty()

actionnotifications is similar, but the suffix is _a_<task ID>:

db.actionnotifications.find({"_id" : "bdd12a44-2fdb-4596-87e5-a2fe851f36de:mongodb/0_a_4"}).pretty()

operations is just with the operation ID:

db.operations.find({"_id" : "bdd12a44-2fdb-4596-87e5-a2fe851f36de:3"}).pretty()

Task and operation ID are returned when you run an action:

Running operation 7 with 1 task
  - task 8 on unit-mongodb-0