Check Replication Lag of MongoDB Replica Set

15 minutes
  • 2 Learning Objectives

About this Hands-on Lab

In this lab, students are asked to check the replication lag of a MongoDB replica set. Replication lag is the amount of time for data written to the primary to be replicated to the secondary members of a replica set. After completing this lab, students will have hands-on experience checking the lag of a MongoDB replica set.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Find Primary Member

Connect to any member and check the replica set status to determine the primary member. To obtain the most current status for your replica set, you should check the status on the primary.

Check Replica Status

Connect to primary member and check secondary member status. Insert a new document and confirm replication.

Additional Resources

You are working as a DBA and are tasked with checking the replication lag of a MongoDB replica set. Thankfully, you've just completed an awesome Mongo Deep Dive course on that showed you how to do just this.

To accomplish this, you will need to complete the following tasks:

  • Find the primary replica set member
  • Check the replica set status

What are Hands-on Labs

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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