Question

ElastiCache, how is read scaling accomplished?

A) By using the "ScaleReads" parameter in the cache cluster configuration.
B) By configuring a read replica to offload read traffic from the primary cache node.
C) By increasing the cache node size for the primary cache cluster.
D) By reducing the cache cluster's retention period for read-intensive workloads.

Answer 1

In Amazon ElastiCache, read scaling is accomplished by configuring a read replica to offload read traffic from the primary cache node. This allows for horizontal scaling and distribution of read traffic.

Step-by-step explanation:

In Amazon ElastiCache, read scaling is accomplished by configuring a read replica to offload read traffic from the primary cache node. When you create a replication group, you can specify one or more read replicas that serve incoming read traffic, reducing the load on the primary cache node.

Read replicas in ElastiCache are fully independent cache clusters that receive data from the primary cache node through an asynchronous replication process. This allows you to scale your read capacity horizontally and distribute the read traffic across multiple replicas.

For example, if your application has high read workloads, you can create multiple read replicas to handle the read requests, while the primary cache node focuses on write operations.