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Can someone explain what is the difference between ebs and instance store?

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In EC2

EBS :

  • It is like the virtual disk of a VM
  • Instances backed by EBS can be easily started, stopped or terminated 
  • Snapshots can be taken at any given point for backups
  • AMIs can be created from EBS snapshots

Instance storage :

  • Local hence faster
  • Non-networked, normally EBS I/O comes at the cost of network bandwidth
  • Has limited I/O per second (IOPS)
  • As soon as the instance is stopped, instance storage is lost

Check out this for more info :

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