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Cloud Computing · Foundational

Amazon Elastic Block Store (EBS)

AWS block storage volumes that attach to EC2 instances and persist independently of instance life.

Definition

EBS provides network-attached block volumes replicated within a single AZ. Volumes can be resized, backed up with snapshots and encrypted with AWS KMS. A volume generally attaches to one instance in the same AZ, except io1/io2 Multi-Attach volumes.

Example

A 500 GiB gp3 volume stores a MySQL data directory on an EC2 instance.

Exam tip

EBS volumes are AZ-scoped; to move one to another AZ, take a snapshot and create a new volume from it.

Related terms