Read-only replicas in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to connect to a Redis read-only replica.

Redis

redis-cli -h [1] -p 6379 --readonly

Drag options to blanks, or click blank then click option'

A127.0.0.1

Blocalhost

Creplica.redis.server

Dmaster.redis.server

Attempts:

3 left

💡 Hint

Common Mistakes

Using the master server hostname instead of the replica.

Using localhost which usually points to the master.

The read-only replica is usually a separate server. Use its hostname or IP to connect.

2fill in blank

medium

Complete the command to check the role of the connected Redis instance.

Redis

redis-cli INFO [1]

Drag options to blanks, or click blank then click option'

Areplication

Bserver

Cmemory

Dclients

Attempts:

3 left

💡 Hint

Common Mistakes

Using INFO server which shows general info, not replication role.

Using INFO memory which shows memory usage.

The INFO replication command shows if the Redis instance is a master or a replica.

3fill in blank

hard

Fix the error in the command to make the replica read-only.

Redis

redis-cli CONFIG SET [1] [2]

Drag options to blanks, or click blank then click option'

Aslave-read-only

Breplica-read-only

Cread-only

Dyes

Attempts:

3 left

💡 Hint

Common Mistakes

Using the old config name 'slave-read-only'.

Using 'no' instead of 'yes' for enabling read-only.

In modern Redis versions, the correct config name is replica-read-only. Setting it to yes makes the replica read-only.

4fill in blank

hard

Fill in the blank to create a Redis replica of a master at 192.168.1.10 port 6379.

Redis

redis-cli [1] 192.168.1.10 6379

Drag options to blanks, or click blank then click option'

A-h

BSLAVEOF

C-p

DREPLICAOF

Attempts:

3 left

💡 Hint

Common Mistakes

Using the deprecated 'SLAVEOF' command.

Using connection flags like -p or -h.

The command REPLICAOF 192.168.1.10 6379 sets the current Redis instance as a replica of the given host and port.

5fill in blank

hard

Fill all three blanks to configure a Redis replica with password authentication.

Redis

redis-cli -h [1] -p [2] -a [3] --readonly

Drag options to blanks, or click blank then click option'

Areplica.redis.local

B6380

CreplicaPass123

Dmaster.redis.local

Attempts:

3 left

💡 Hint

Common Mistakes

Using the master host instead of the replica.

Using the default port 6379 instead of the replica port.

Forgetting to add the password.

Connect to the replica host replica.redis.local on port 6380 using password replicaPass123 and enable read-only mode.