Cluster creation in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to create a Redis cluster with 3 nodes.

Redis

redis-cli --cluster create [1]

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

A127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 --cluster-replicas 0

B127.0.0.1:6379 127.0.0.1:6380 127.0.0.1:6381

C127.0.0.1:7000 127.0.0.1:7001

Dlocalhost:7000 localhost:7001 localhost:7002

Attempts:

3 left

💡 Hint

Common Mistakes

Using default Redis ports (6379) which are not cluster nodes.

Omitting the --cluster-replicas option.

Providing fewer than 3 nodes.

The correct command includes the IP and ports of the 3 nodes and specifies zero replicas.

2fill in blank

medium

Complete the command to add a node to an existing Redis cluster.

Redis

redis-cli --cluster add-node [1] 127.0.0.1:7000

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

A127.0.0.1:7001

B127.0.0.1:6380

C127.0.0.1:7002

Dlocalhost:7003

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-cluster ports like 6380.

Using localhost instead of IP:port format.

Adding a node that is already part of the cluster.

You add the new node's IP and port, here 127.0.0.1:7002, to the cluster via an existing node.

3fill in blank

hard

Fix the error in the command to create a cluster with replicas.

Redis

redis-cli --cluster create 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 [1] 1

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

A--cluster-replicas-count

B--cluster-replica

C--replicas

D--cluster-replicas

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect option names like --cluster-replica or --replicas.

Omitting the option entirely.

Using a wrong number format.

The correct option to specify replicas is --cluster-replicas followed by the number.

4fill in blank

hard

Fill both blanks to specify the cluster creation with 3 nodes and 1 replica each.

Redis

redis-cli --cluster create [1] --cluster-replicas [2]

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

A127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005

B127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002

C1

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Listing only 3 nodes when replicas are specified.

Setting replicas to 3 instead of 1.

Using wrong IP:port formats.

You need to list all 6 nodes (3 masters + 3 replicas) and set replicas to 1.

5fill in blank

hard

Fill all three blanks to create a cluster with 3 masters, 3 replicas, and assign replicas correctly.

Redis

redis-cli --cluster create [1] --cluster-replicas [2] --cluster-assign-replicas [3]

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

A127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005

B1

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting some nodes.

Setting replicas to 0 or more than 1.

Using 'false' for replica assignment.

The command lists all nodes, sets replicas to 1, and enables automatic replica assignment.