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 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.
For a more detailed discussion of which node size to use, see Choosing your node size.
Generally speaking, due to its support for sharding, Valkey or Redis OSS (cluster mode enabled) deployments have a number of smaller nodes. In contrast, Valkey or Redis OSS (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.
Topics
Some important operations involving nodes are the following:
