master-master replication in mongodb Did anyone tried master-master replication in mongodb. i have used replica set and master-slave replication. But we want to go with 2 data centers and need a master in each data center. i am using latest 3.2 version. Can anyone tried this kind of architecture.
MongoDB doesn't do master-master replication; you can only have a single primary:

Replication in MongoDB
A replica set is a group of mongod instances that maintain the same data set. A replica set contains several data bearing nodes and optionally one arbiter node. Of the data bearing nodes, one and only one member is deemed the primary node, while the other nodes are deemed secondary nodes.