Cluster failover in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to check the cluster nodes status.

Redis

redis-cli [1]

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

ACLUSTER NODES

BPING

CINFO

DGET

Attempts:

3 left

💡 Hint

Common Mistakes

Using INFO instead of CLUSTER NODES.

Using PING which only checks connectivity.

Using GET which is for keys, not cluster info.

The CLUSTER NODES command lists all nodes in the Redis cluster and their status.

2fill in blank

medium

Complete the command to trigger a manual failover on a Redis replica node.

Redis

redis-cli [1] FAILOVER

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

ACLUSTER

BREPLICA

CFAILOVER

DSLAVEOF

Attempts:

3 left

💡 Hint

Common Mistakes

Using REPLICA FAILOVER which is not a valid command.

Using FAILOVER alone without CLUSTER prefix.

Using SLAVEOF which is deprecated in cluster mode.

The CLUSTER FAILOVER command forces a replica to become a master during failover.

3fill in blank

hard

Fix the error in the command to check cluster slots allocation.

Redis

redis-cli [1] SLOTS

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

ANODES

BSLOT

CCLUSTER

DINFO

Attempts:

3 left

💡 Hint

Common Mistakes

Using SLOT instead of SLOTS.

Using INFO which does not show slots.

Using NODES which shows node info but not slots.

The correct command is CLUSTER SLOTS to view slot allocation in the cluster.

4fill in blank

hard

Fill both blanks to create a command that sets a node as a replica of another node.

Redis

redis-cli [1] [2] <master-node-id>

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

ACLUSTER

BREPLICAOF

CFAILOVER

DREPLICATE

Attempts:

3 left

💡 Hint

Common Mistakes

Using REPLICAOF which is not valid in cluster mode.

Using FAILOVER which triggers failover but does not assign master.

Using REPLICAOF alone without CLUSTER prefix.

The command CLUSTER REPLICATE <master-node-id> sets the current node as a replica of the specified master node.

5fill in blank

hard

Fill all three blanks to create a command that forces a replica to failover and become master immediately.

Redis

redis-cli [1] FAILOVER [2] [3]

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

ACLUSTER

BFORCE

CTAKEOVER

DABORT

Attempts:

3 left

💡 Hint

Common Mistakes

Using ABORT which cancels failover.

Omitting FORCE or TAKEOVER which delays failover.

Using FAILOVER alone without options.

The command CLUSTER FAILOVER FORCE TAKEOVER forces a replica to become master immediately, even if the master is still reachable.