REPLICAOF command in Redis - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the REPLICAOF command do in Redis?

It makes the current Redis server a replica of another Redis server by specifying the master server's IP and port.

beginner

How do you stop a Redis server from being a replica using REPLICAOF?

Use REPLICAOF NO ONE to make the Redis server stop replicating and become a master again.

beginner

Syntax of the REPLICAOF command?

REPLICAOF <masterip> <masterport>

or

REPLICAOF NO ONE

to stop replication.

intermediate

What happens to the data on a Redis server when you run REPLICAOF <masterip> <masterport>?

The server clears its current data and starts syncing data from the specified master server.

intermediate

Can a Redis server be a replica of multiple masters at the same time using REPLICAOF?

No, a Redis server can only replicate from one master at a time.

What command makes a Redis server stop replicating and become a master again?

A MASTEROF NO ONE

B REPLICAOF 127.0.0.1 6379

C SLAVEOF NO ONE

D REPLICAOF NO ONE

The command REPLICAOF NO ONE stops replication and makes the server a master.

What does the REPLICAOF command require as arguments?

A Database name and password

B Replica name and port

C Master IP and port

D User and password

REPLICAOF needs the master server's IP address and port number.

If you run REPLICAOF 192.168.1.10 6379, what happens?

A The server becomes a replica of the master at 192.168.1.10:6379

B The server becomes a master

C The server deletes all data permanently

D The server restarts

This command makes the server replicate data from the specified master.

Can a Redis server replicate from two masters at the same time?

A Yes, up to two masters

B No, only one master at a time

C Yes, unlimited masters

D Only if configured in cluster mode

Redis supports replication from only one master per replica server.

Which Redis command was previously used instead of REPLICAOF?

A SLAVEOF

B MASTEROF

C FOLLOW

D SYNC

SLAVEOF was the old name for REPLICAOF.

Explain how the REPLICAOF command is used to set up replication in Redis.

Think about how a server becomes a replica and how it can stop replicating.

Describe what happens internally when a Redis server runs REPLICAOF <masterip> <masterport>.

Consider the data and role changes on the server.