Amazon ElastiCache
ElastiCache for Memcached User Guide (API Version 2015-02-02)

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 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, Memcached deployments will have a number of smaller nodes. See Choosing Your Memcached Node Size for a more detailed discussion of which node size to use.

Other ElastiCache Node Operations

Additional operations involving nodes: