New EBS Volume Type (io2) – 100x Higher Durability and 10x More IOPS/GiB
Over the years, we have increased the ratio of IOPS per gibibyte (GiB) of SSD-backed storage several times, most recently in August 2016. This ratio started out at 10 IOPS per GiB, and has grown steadily to 50 IOPS per GiB. In other words, the bigger the EBS volume, the more IOPS it can be provisioned to deliver, with a per-volume upper bound of 64,000 IOPS. This change in ratios has reduced storage costs by a factor of 5 for throughput-centric workloads.