Effective DevOps with AWS

ElastiCache

ElastiCache is a managed service that lets you create in-memory key-value stores. At a very high level, you will create a cluster and then update your application to use it. The changes are fairly simple. Let's imagine a phone book application. Whenever we want to retrieve the address of a business, we will need to access our database to retrieve that information. For popular businesses such as banks or post offices, for example, it is likely that the exact same query will be run very frequently. Instead of always reaching to our database, we can update our application logic to check the cache first and, if the information isn't cached, retrieve it from the database and then cache the result:

Sub get_address(name) address = cache.get(name, ...