ElastiCache for Redis Cluster Backups vs Snapshots

What is the difference between a backup in ElastiCache for Redis Cluster and a snapshot in ElastiCache for Redis?

a) Backups and snapshots are the same in both configurations. b) Backups in Redis Cluster are faster than snapshots in Redis. c) Backups capture the entire cluster, while snapshots are node-specific. d) Redis Cluster does not support backup or snapshot features.

Answer:

A backup in ElastiCache for Redis Cluster captures the entire cluster, while a snapshot in ElastiCache for Redis is node-specific.

Backups in ElastiCache for Redis Cluster and snapshots in ElastiCache for Redis are different in their scope and functionality. A backup in ElastiCache for Redis Cluster captures the entire cluster, including all the nodes and data within them. It is a point-in-time copy of the entire cluster, providing a complete backup solution.

On the other hand, a snapshot in ElastiCache for Redis is node-specific, capturing the data of a single node at a point in time. It is useful for creating a restore point for a specific node without impacting the rest of the cluster.

The main difference between a backup in ElastiCache for Redis Cluster and a snapshot in ElastiCache for Redis lies in what they capture. The backup in Redis Cluster captures the entire state of the cluster, including all of its nodes. This means that when a backup is restored, it brings back the complete image of the cluster as it was during the backup. This is a useful feature particularly when you want to restore the complete cluster due to a catastrophic failure.

Therefore, option c) is the correct answer.