From my understanding, these are blade servers; there is no "local" hard drive - everything is either from a SAN (EBS) or from S3.  And yes, sometimes s3-backed systems experience I/O latency.


there are 2 options for the __AMI__ 

S3 backed AMI

EBS backed AMI

After you spin up you instance it there is a local storage involved in the game. You can ask Amazon on the public forum about it.



 
Brian

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