Amazon EC2 Instance Storage Section - rajeshkumarplv/aws-ccp-notes GitHub Wiki

Amazon EC2 Instance Storage

What is EBS Volume

  • • An EBS (Elastic Block Store) Volume is a network drive you can attach to your instances while they run
  • • It allows your instances to persist data, even after their termination
  • • They can only be mounted to one instance at a time (at the CCP level)
  • • They are bound to a specific availability zone
  • • Analogy: Think of them as a “network USB stick”`
  • • Free tier: 30 GB of free EBS storage of type gp2 per month

EBS Volume

  • • It’s a network drive (i.e. not a physical drive)
  • • It uses the network to communicate the instance, which means there might be a bit of latency

  • • It can be detached from an EC2 instance and attached to another one quickly
  • • It’s locked to an Availability Zone (AZ)
  • • An EBS Volume in us-east-1a cannot be attached to us-east-1b

  • • To move a volume across, you first need to snapshot it
  • • Have a provisioned capacity (size in GBs, and IOPS)
  • • You get billed for all the provisioned capacity

  • • You can increase the capacity of the drive over time