Elasticache

Question 1

What is Global Datastore for Redis

Answer 1

Enables you to create cross-Region read replica clusters for ElastiCache (Redis OSS) to enable low-latency reads and disaster recovery across AWS Regions

Question 2

Redis provides a range of persistence options. These include:

Answer 2

• RDB (Redis Database): RDB persistence performs point-in-time snapshots of your dataset at specified intervals.
• AOF (Append Only File): AOF persistence logs every write operation received by the server. These operations can then be replayed again at server startup, reconstructing the original dataset.
• No persistence: You can disable persistence completely. This is sometimes used when caching.
• RDB + AOF: You can also combine both AOF and RDB in the same instance.

Question 3

To enable at-rest encryption on an existing Elasticache for Redis replication group:

Answer 3

1. Create a manual backup of your existing replication group.
2. Create a new replication group by restoring from the backup. On the new replication group, enable at-rest encryption.
3. Update the endpoints in your application to point to the new replication group.
4. Delete the old replication group.

Question 4

How to enable encryption on an Elastiche for Redis serverless cache?

Answer 4

It is always enabled on a serverless cache

Question 5

When the Eslasticache for Redis cache is backed up, which encryption keys option are available under encryption options?

Answer 5

When the he Eslasticache for Redis cache is backed up, under encryption options, choose whether to use the default encryption key or a customer-managed key.