Cluster architecture in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the cluster nodes information.

Redis

redis-cli [1] nodes

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

Acluster

Binfo

Cget

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'info' instead of 'cluster' will show general info, not cluster nodes.

Using 'get' or 'list' are not valid Redis CLI commands for cluster nodes.

The cluster nodes command shows the cluster nodes information in Redis.

2fill in blank

medium

Complete the code to add a node to the Redis cluster.

Redis

redis-cli --cluster [1] 127.0.0.1:7003 127.0.0.1:7000

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

Acreate

Bjoin

Cadd-node

Dconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'create' is for creating a new cluster, not adding nodes.

Using 'join' or 'connect' are not valid Redis cluster commands.

The --cluster add-node option is used to add a new node to an existing Redis cluster.

3fill in blank

hard

Fix the error in the command to reshard slots in the cluster.

Redis

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

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

Amigrate

Breshard

Crebalance

Dresync

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'rebalance' or 'resync' are not valid Redis cluster commands.

Using 'migrate' is a different command for key migration, not cluster resharding.

The correct command to move slots between nodes is --cluster reshard.

4fill in blank

hard

Fill both blanks to check the cluster's slot allocation and node status.

Redis

redis-cli [1] cluster [2]

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

Ainfo

Bnodes

Cslots

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'nodes' or 'status' after 'info cluster' will cause errors or unexpected output.

Using 'nodes slots' is not a valid command sequence.

The command redis-cli info cluster slots shows slot allocation and cluster info.

5fill in blank

hard

Fill all three blanks to create a Redis cluster with 3 nodes and 1 replica each.

Redis

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

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

A127.0.0.1:7000

B127.0.0.1:7001

C127.0.0.1:7002

D127.0.0.1:7003

Attempts:

3 left

💡 Hint

Common Mistakes

Including port 7003 is extra and not needed for this 3-node cluster.

Using fewer than three nodes will cause the cluster creation to fail.

The command creates a cluster with nodes at ports 7000, 7001, and 7002, each having one replica.