Volumes

• Experiment: Create an Ec2 instance (ubuntu/amazon linux) and observe the volumes created.

  • When we create an ec2 instance one volume is attached at minimum (root volume)
  • Back up of the volume is snapshot

• From Snapshot what can we do ?

  • Create a EBS Volume from snapshot in any AZ and also we can make this snapshot to be copied to other region.
  • Snapshot can be copied to any region
  • Snapshot can be used to create an EBS volume in any AZ of the same region

• Create a snapshot and copy the snapshot into other region

• Create a snapshot and create a volume in other AZ

Snapshots

• Snapshot is backup of Volume
• First snapshot of the volume is generally a full backup
• Second Snapshot will be incremental backup and it will have depenedency of first snapshot

Case-1: Latest snapshot is deleted

• Latest snapshot delete might delete the data present in the latest snapshot, but older ones are intact

Case-2: Older snapshot is deleted

• Data from the older snapshot will be copied into the snaphsot depending on it

Storage Size Measurement

• In AWS Storage size is measure in GiB (Gibi Bytes) Refer Here