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What is Amazon ElastiCache?
This revision card explains What is Amazon ElastiCache? Every product-page hit querying RDS for the same row wastes time and money. It describes elastiCache is managed Redis or Memcached in your VPC for low-latency caching and some Redis data structures. The how-to section covers how to create a cache subnet group , then security group , then Redis cluster/replication group , then connect from app in VPC. An example on the card is GET product:42 hits Redis in sub-ms after the first DB fill.
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What this card says
Why do we need it?
Every product-page hit querying RDS for the same row wastes time and money.
What is it?
ElastiCache is managed Redis or Memcached in your VPC for low-latency caching and some Redis data structures.
Redis / Memcached
How to do it
Create a cache subnet group → security group → Redis cluster/replication group → connect from app in VPC.
Example
GET product:42 hits Redis in sub-ms after the first DB fill.