Flat 10% & upto 40% off + 10% Cashback + Free additional Courses. Hurry up


Replication is the procedure of synchronizing the data across different servers. This feature increases data availability and provides redundancy. It secures the database from significant failure due to server downtime.

Not only this, Replication helps recover the database from a system failure by keeping additional copies of data.

MongoDB uses replica set which is a group of mongod instances that host the similar data sets. A replica consists of a primary node that receives all the write operations and all other instances apply operations from the primary node. Typically there is only one primary node and rest all are secondary nodes. Following diagram will help you understand the replication process in a better way :


The client applications interact with the primary node which then replicates the data on the secondary nodes. The primary node is election with common consensus.

Procedure to create a replica set

In order to convert a standalone MongoDB instance into a replica set, follow given procedure –

  • If your MongoDB server is running, shut it down.
  • Restart the MongoDB server and select the ‘replset’ option and follow the instructions.

Following command will create a replica set-

mongod –port “PORT” –dbpath “YOUR_DB_DATA_PATH” –replSet “REPLICA_SET_INSTANCE_NAME”

"0 Responses on Replication"

100% Secure Payments. All major credit & debit cards accepted Or Pay by Paypal.

Sales Offer

  • To avail this offer, enroll before 20th February 2018.
  • This offer cannot be combined with any other offer.
  • This offer is valid on selected courses only.
  • Please use coupon codes mentioned below to avail the offer

Sign Up or Login to view the Free Replication.