For more information about instance types that can be launched as EBS-optimized instances, see Amazon EC2 Instance Types.

When attached to EBS-optimized EC2 instances, io2 is designed to achieve single-digit millisecond latencies and is designed to deliver the provisioned performance 99.9% of the time. To maximize the benefit of io2, we recommend using EBS-optimized EC2 instances. io2 volumes also provide up to 1,000 MB/s of throughput per volume. Io2 is designed to deliver a consistent baseline performance of up to 500 IOPS/GB to a maximum of 64,000 IOPS. io2 is a high performance EBS storage option designed for business-critical, I/O intensive database applications, such as SAP HANA, Oracle, Microsoft SQL Server, and IBM DB2 that have high durability requirements. Io2 is a new generation of the Provisioned IOPS SSD volumes that is designed to provide 100X durability of 99.999% as well as a 10X higher IOPS to storage ratio of 500 IOPS for every provisioned GB –at the same price as the previous generation (io1). The following tables show use cases and performance characteristics of each EBS volume: HDD-based volumes include Throughput Optimized HDD (st1) for frequently accessed, throughput intensive workloads and the lowest cost Cold HDD (sc1) for less frequently accessed data. SSD-based volumes include the highest performance EBS volumes (io2 and io1) for your most demanding transactional applications including SAP HANA, Microsoft SQL Server and IBM DB2, and General Purpose SSD volumes (gp3 and gp2) that balance price and performance for transactional applications, including virtual desktops, test and development environments, and interactive gaming applications. These volume types are divided into two major categories: SSD-backed storage for transactional workloads, such as databases, virtual desktops and boot volumes, and HDD-backed storage for throughput intensive workloads, such as MapReduce and log processing. Amazon EBS provides multiple volume types that allow you to optimize storage performance and cost for a broad range of applications.

Aws ebs pricing