- Elastic Block Store
- Used with EC2 Instances
- Network attached storage
- Block level storage
- Suitable for creating filesystems and running databases (unlike S3)
- EBS multi-attach allows you to attach an EBS volume to multiple EC2 Instances(upto 16)
- Multiple EBS volumes can be attached to an EC2 instance
- To attach, EBS volume should be in the same Availability zone as the EC2 Instance.
- Attached EBS volumes cannot be deleted. To delete, you should first detach the volume from the EC2 Instance.
- By default, root ebs volumes are terminated when an Instance is terminated.
- By default, non-root ebs volumes persist when an Instance is terminated.
- Supports Encryption.
- Types of EBS volumes:
- General Purpose SSD
- 1GB to 16TB
- Max IOPS 16000
- Suitable for most general requirements
- Provisioned IOPS SSD
- 4GB to 16TB
- Max IOPS 64000
- Suitable for large database workloads
- Throughput Optimized HDD
- 500GB to 16TB
- Max IOPS 500
- Not suitable for root volume
- Cold HDD
- 500GB to 16TB
- Max IOPS 250
- Not suitable for root volume
- Lowest cost
- General Purpose SSD
- EBS volumes can be backed up by capturing snapshots (point in time images)
- Snapshots are incremental
- Snapshots can be used for migrating EBS volumes/ duplicating EBS volumes/ encrypting EBS volumes
- Snapshots are region specific.
- Snapshots can be shared with other AWS accounts
