Adding and removing nodes in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to add a new node to a Redis cluster.

Redis

redis-cli --cluster add-node [1] 127.0.0.1:7001 127.0.0.1:7000

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

A127.0.0.1:7005

B127.0.0.1:7003

C127.0.0.1:7004

D127.0.0.1:7002

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same address as an existing node.

Mixing up the order of node addresses.

The add-node command requires the address of the new node to add. Here, 127.0.0.1:7002 is the new node being added to the cluster.

2fill in blank

medium

Complete the command to remove a node from a Redis cluster by its node ID.

Redis

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

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

A1234567890abcdef1234567890abcdef12345678

Babcdef1234567890abcdef1234567890abcdef12

Cfedcba0987654321fedcba0987654321fedcba09

D0987654321fedcba0987654321fedcba09876543

Attempts:

3 left

💡 Hint

Common Mistakes

Using the IP address instead of the node ID.

Using an incorrect or partial node ID.

The del-node command requires the node ID to remove. The correct node ID here is 1234567890abcdef1234567890abcdef12345678.

3fill in blank

hard

Fix the error in the command to add a node to the cluster by filling the blank.

Redis

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

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

A127.0.0.1

B127.0.0.1:7001

C7001

Dlocalhost:7001

Attempts:

3 left

💡 Hint

Common Mistakes

Providing only the port number.

Using hostname instead of IP address.

The add-node command requires the full address (IP and port) of the new node. Only 127.0.0.1:7001 is valid here.

4fill in blank

hard

Fill both blanks to create a command that removes a node by ID from the cluster.

Redis

redis-cli --cluster del-node [1] [2]

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

A127.0.0.1:7000

Babcdefabcdefabcdefabcdefabcdefabcdefabcd

C1234567890abcdef1234567890abcdef12345678

D127.0.0.1:7001

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the node address and node ID.

Using an invalid node ID.

The first blank is the cluster node address to connect to, and the second blank is the node ID to remove.

5fill in blank

hard

Fill all three blanks to create a command that adds a node and assigns slots to it.

Redis

redis-cli --cluster add-node [1] [2] --cluster-slots [3]

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

A127.0.0.1:7002

B127.0.0.1:7000

C0-5460

D127.0.0.1:7001

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of node addresses.

Using invalid slot ranges.

The first blank is the new node address, the second is the existing cluster node address, and the third is the slot range assigned to the new node.