Master-replica architecture in Redis - Mini Project: Build & Apply

Master-Replica Architecture with Redis

📖 Scenario: You are setting up a simple Redis database system for a small online store. To ensure data safety and availability, you want to create a master-replica setup where the master handles writes and the replica keeps a copy for reads and backup.

🎯 Goal: Build a Redis master-replica architecture configuration with one master and one replica. You will create the master data, configure the replica to follow the master, and verify the replication setup.

📋 What You'll Learn

Create a Redis master instance with initial data

Configure a Redis replica instance to replicate the master

Verify the replication status on the replica

Use exact Redis commands and configuration keys as specified

💡 Why This Matters

🌍 Real World

Master-replica architecture is used in real-world applications to improve data availability and reliability by keeping copies of data on multiple servers.

💼 Career

Understanding master-replica setup is important for roles like database administrators, backend developers, and system engineers who manage scalable and fault-tolerant data systems.

1

Create the Redis master data

Use the Redis command SET to create a key called product:1001 with the value Laptop on the master instance.

Redis

# Use the SET command to create the key and value
# Your code here

Need a hint?

Use the SET command followed by the key and the value.

2

Configure the replica to follow the master

Use the Redis command REPLICAOF with the master IP 127.0.0.1 and port 6379 to configure the replica instance to follow the master.

Redis

SET product:1001 Laptop
# Use REPLICAOF to configure the replica
# Your code here

Need a hint?

Use REPLICAOF followed by the master's IP and port to set up replication.

3

Check the replication status on the replica

Use the Redis command INFO replication on the replica instance to check the replication status and confirm it is connected to the master.

Redis

SET product:1001 Laptop
REPLICAOF 127.0.0.1 6379
# Use INFO replication to check status
# Your code here

Need a hint?

Run INFO replication to see if the replica is connected to the master.

4

Verify data replication on the replica

Use the Redis command GET product:1001 on the replica instance to verify that the key product:1001 with value Laptop has been replicated from the master.

Redis

SET product:1001 Laptop
REPLICAOF 127.0.0.1 6379
INFO replication
# Use GET to verify replicated data
# Your code here

Need a hint?

Use GET with the key name to check the replicated value.