http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-io-characteristics.html http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-io-ch... "Amazon EBS meas

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-io-characteristics.html http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-io-ch... "Amazon EBS measures each I/O operation per second (that is 256 KB or smaller) as one IOPS"