mongodbHow to set MongoDB oplog?

MongoDB oplog is a special capped collection that keeps a rolling record of all operations that modify the data stored in your databases. To set up oplog, you need to start MongoDB with the --replSet option.

mongod --replSet myReplSet

Once the MongoDB instance is running, you can initiate the replica set using the rs.initiate() command.

rs.initiate()

Code explanation

1. mongod --replSet: This command starts MongoDB with the --replSet option, which enables replication and sets up the oplog.

2. rs.initiate(): This command initiates the replica set and creates the oplog.

Helpful links

• MongoDB Replica Set Oplog
• Replica Set Oplog Internals

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