Managing nodes - Amazon ElastiCache for Redis
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Managing nodes

A node is the smallest building block of an Amazon ElastiCache deployment. It is a fixed-size chunk of secure, network-attached RAM. Each node runs the engine that was chosen when the cluster or replication group was created or last modified. Each node has its own Domain Name Service (DNS) name and port. Multiple types of ElastiCache nodes are supported, each with varying amounts of associated memory and computational power.

Generally speaking, due to its support for sharding, Redis (cluster mode enabled) deployments have a number of smaller nodes. In contrast, Redis (cluster mode disabled) deployments have fewer, larger nodes in a cluster. For a more detailed discussion of which node size to use, see Choosing your node size.

Some important operations involving nodes are the following: