Elastic Block Store is a network drive that you attach. It persists. They are bound to specific AZ Low cost, low performance Good for long-term storage
Volume Types
There are 6 types of volumes
- gp2/gp3 (SSD): General purpose SSD, price-performance
- io1/io2 Block Express (SSD): Highest-performance SSD volume for mission-critical low-latency or high-throughput workloads (provisioned IOPS). Great for database workloads. They support multi-attach
- st1 (HDD): Low cost HDD volume designed for frequently access, throughput-intensive workloads like big data, data warehouses, log processing etc
- sc1 (HDD): Lowest cost HDD volume designed for less frequently accessed workloads
Only gp2/gp3 and io1/io2 Block Express can be used as boot volumes
Multi-Attach
- Only available in io1/io2 Block Express
- Up to 16 EC2 instances at a time
- Must use a file system that’s cluster-aware (not XFS, EXT4 etc)
EBS Encryption
- Has minimal impact on latency
- Leverages keys from KMS (AES-256)
To encrypt an EBS volume, you need to create a snapshot, copy it and encrypt it, then create a volume from it
Or you can take an unencrypted snapshot, create volume from it and while doing that, enable encryption
Snapshots
Backup of EBS Not necessary to detach the volume, but recommended
- You can copy snapshots across AZ or region
Snapshot Features
- EBS Snapshot Archive: Move snapshot to “archive” tier which is %75 cheaper
- Takes within 24-72 hours for restoring the archive
Recycle Bin for EBS Snapshots
Retention period to recover accidental deletion
- Setup rules to retention (1 day to 1 year)
Fast Snapshot Restore (FSR)
- It is a fast snapshot that takes no latency on initialization, expensive