MongoDB - db.isMaster()

By Yashwant Chavan, Views 2067, Last updated on 29-Oct-2016

db.isMaster() - method returns document that describes the role of the mongod instance. If the instance is a member of a replica set, then isMaster returns a subset of the replica set configuration and status including whether or not the instance is the primary of the replica set. Refer following db.isMaster() method syntax.

tags mongodb

db.isMaster() syntax


db.isMaster() output

> db.isMaster()
        "ismaster" : true,
        "maxBsonObjectSize" : 16777216,
        "maxMessageSizeBytes" : 48000000,
        "maxWriteBatchSize" : 1000,
        "localTime" : ISODate("2016-10-29T10:35:52.506Z"),
        "maxWireVersion" : 5,
        "minWireVersion" : 0,
        "readOnly" : false,
        "ok" : 1


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