Understanding MongoDB Replication: A Step-by-Step Replica Set Creation.

Explore MongoDB replication for High Availability and Data Redundancy.

In this video, we will delve into the importance of Replication, uncovering the problems it solves. We'll explore the concept of scalable reads and discover how to boost performance through read preference.

✅What is Replication in MongoDB?
✅What Kind of Problem does this approach solve?
✅Benefits?
✅Replica Set Cluster Creation
✅Disaster Simulation
✅MongoDB Compass + Aggregation

Finally, we'll walk through the creation of a replica set cluster with 3 nodes, simulate disasters to observe MongoDB's automatic handling, and conclude by connecting via MongoDB Compass to execute aggregation pipelines

0:00 Intro - Replication
0:56 - High Availability
0:02:38 - Data Redundancy
0:03:52 - Scalable Reads
0:04:58 - Practice - Setting Up Instance
0:08:24 - Practice - Initiating Replica Set
0:10:56 - Practice - Inserting data for Replication
0:13:30 - Practice - Simulating Cluster Disaster
0:15:20 - Practice - Aggregation Pipeline with Compass
0:18:05 - Final

👉 References:

📖 Explore further in my article on Medium:

#database #mongodb #MongoDBReplication #Replication #availability #nosql #replica #replicaset #dba #developer #softwareengineer #sre #MongoDBbasics #Nosqltutorial #tutorial #forbeginners #handson #tutorial #stepbystep

[theDanielJLewis]

This demo was fantastic to show how it actually works! Thank you!

Two-ish questions:

1. When a failed server reconnects does it automatically resync any missing data? And does it take over being primary again?
2. Is the performance gain from this simply in reading from a replica that is _not_ also receiving writes?