Amazon Web Services: ElastiCache

In This blog we will discuss Elastic Cache

ElastiCache is the in memory caching mechanism. It is the memcache under the hood. It is 100% API compliant.More appropriately it is a memcache cluster


Memcache is a popular , opensource in -memory cache. it is  very fast read and writes.It takes burden of backend resources

Memcache is a key value store.It is a NOSql DB. Its only access method is a key

ElastiCache is actually a memcache cluster. it is a distributed collection of cache nodes

Its available in only Single AZ

Cache nodes are very user specified types

• very much like EC2 Instance type
• can be wrapped with security groups
• can buy capacity reservations
• Resizeable ( remove or add nodes)

To Setup and ElastiCache

• Choose an AZ
• Chose node types, # of nodes
• Launch Cluster
• Connect application by pointing to elasticache endpoint
• Benchmark, resize ( if necessary)

Elasticache Expiry

• Expiring Key is controlled via the elasticache API (memcache commands)
• Scheduled
• on demand

ElastiCache Pricing

• It has per hour node charge
• Bandwidth Charges- Bandwidth Charges are free inside the AZ but Charged $0.1/GB in or out of AZs