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db.hello()

db.hello()

New in version 4.0.21: (and 3.6.21)

Returns a document that describes the role of the mongod instance.

If the mongod is a member of a replica set, then the isWritablePrimary and secondary fields report if the instance is the primary or if it is a secondary member of the replica set.

See

hello for the complete documentation of the output of db.hello().