Part 7: Understanding Amazon Elastic Block Store Performance: 10% of your provisioned IOPS 99.9% of the time

Understanding the 10% statement of PIOPS

“Provisioned IOPS volumes are designed to deliver within 10% of your provisioned IOPS 99.9% of the time”. In simpler terms, it means for a volume provisioned with 2000 IOPS, your volume should deliver at least 1800 IOPS 99.9% of the time. (This is measured based on one minute intervals). When you design EBS Striping (RAID 0) with 6 disks (example 1 TB each with 2000 IOPS) you need to factor 6 X 1800 = 10800 IOPS as the bottom line and not 12000 IOPS.


EBS Article Series (continued..)

Part 1: Understanding Amazon Elastic Block Store
Part 2: Understanding Standard EBS Volumes
Part 3: Understanding EBS PIOPS Volumes
Part 4: Understanding EBS-Optimized Instances
Part 5: Understanding Latency in EBS
Part 7: 10% of your provisioned IOPS 99.9% of the time
Part 8: Performance Tuning - Pre Warming the EBS volume
Part 9: Performance Tuning - EBS Striping
Part 10: Performance Tuning - IO Block Size
Part 11: Understanding Amazon EBS Snapshots
Part 12: Securing Amazon EBS volumes - EBS Encryption using SecureCloud 
Part 13: Amazon EBS Security Best practices and tips