A Cloud Guru - Certified Solutions Architect Associate - EBS Volumes Lab
EBS Volumes Lab Summary
- Volumes exist on EBS:
- Virtual Hard Disk
- Snapshots exist on S3.
- Snapshots are point in time copies of Volumes.
- Snapshots are incremental - this means that only the blocks that have changed since your last snapshot are moved to S3.
- If this is your first snapshot, it may take some time to create.
- To create a snapshot for Amazon EBS volumes that serve as root devices, you should stop the instance before taking the snapshot.
- However you can take a snap while the instance is running.
- You can create AMI’s from both Volumes and Snapshots.
- You can change EBS volume sizes on the fly, including changing the size and storage type.
- Volumes will ALWAYS be in the same availability zone as the EC2 instance.
- To move an EC2 volume from one AZ/Region to another, take a snap or an image of it, then copy it to the new AZ/Region.
- Snapshots of encrypted volumes are encrypted automatically.
- Volumes restored from encrypted snapshots are encrypted automatically.
- You can share snapshots, but only if they are unencrypted.
- These snapshots can be shared with other AWS accounts or made public.