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I am new to AWS and trying to understand what is Amazon EBS and instance store and why is it needed ?

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    [Benefits of EBS vs. instance-store (and vice-versa)](https://stackoverflow.com/questions/3630506/benefits-of-ebs-vs-instance-store-and-vice-versa) – stdunbar Jul 16 '18 at 14:54

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The simple rule of thumb is:

Use Amazon EBS unless you have a specific reason to use Instance Store

Instance Store is mostly an older technology from the days before EBS. See amazon ec2 - Benefits of EBS vs. instance-store (and vice-versa) - Stack Overflow for information about the differences.

A few reasons you might choose Instance Store are:

  • Instances are totally ephemeral and you will never need to snapshot/restore their disks
  • You need really fast storage, since Instance Store is locally attached
  • You're particularly cheap, and you'd rather spend several hours of your time saving a few cents on storage
John Rotenstein
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