In PM-3020 we added a new command checkMetadataConsistency that returns a cursor.

The command can be invoke at collection, database or cluster level and we should expose helpers for each level.

• Collection:
  The command is invoked on "db" and the name of the collection is passed as command parameter

  db.coll.checkMetadataConsistency(optionalOptions = {})
  

• Database:
  The command is invoked on "db" and command parameter is either empty string "" or 1

  db.checkMetadataConsistency(optionalOptions = {})
  

• Cluster level
  The command is invoked on "admin" database and command parameter is either empty string "" or 1
  This level could be exposed either as sh function (I found this more intuitive):

  sh.checkClusterMetadataConsistency(optionaOptions = {})
  

  Or we can reuse the database helper and call it on the "admin" database:

  db.getSiblingDB('admin').checkMetadataConsistency(optionaOptions = {})