Overview of reserved nodes

When you purchase a MemoryDB reserved node, you purchase a commitment to getting a discounted rate, on a specific node type, for the duration of the reserved node. To use a MemoryDB reserved node, you create a new node just like you do for an on-demand node. The new node that you create must match the specifications of the reserved node. If the specifications of the new node match an existing reserved node for your account, you are billed at the discounted rate offered for the reserved node. Otherwise, the node is billed at an on-demand rate. You can use the AWS Management Console, the AWS CLI, or the MemoryDB API to list and purchase available reserved node offerings.

MemoryDB offers reserved nodes for the memory optimized R7g, R6g, and R6gd (with data tiering) nodes. For pricing information, see MemoryDB Pricing.