Starting nowadays,you can save up to 50% on Amazon Elastic Block Store (EBS) by launching Amazon EC2 instances and Amazon Elastic MapReduce (EMR) clusters with two new EBS volumes, Throughput Optimized HDD (st1) and Cold HDD (sc1). These new volume types offer better price performance, or improved performance consistency,and higher throughput compared to our existing EBS Magnetic offering. Both are designed for throughput-intensive and colossal data workloads, which are characterized by having large data sets, and large I/O sizes,and sequential I/O patterns. Examples of these workloads include MapReduce, Kafka, or log processing,data warehouse, and ETL.
Source: amazon.com