Elastic Block Store

Highly available and scalable storage volumes you can attach to EC2 instances.

Production Workloads: designed for critical workloads;
Highly Available: automatically replicated withing a single availability zone;
Scalable: dynamically increase capacity and change the type volume with no downtime or performance impact.

General Purpose SSD - gp2 or gp3

A reasonable price for a reasonable performance.

Suitable for boot disks and general applications.

gp2	gp3
3 IOPS/GiB	Baseline of 3,000 IOPS for all volumes
Up to `16,000 IOPS` per volume	Up to `16,000 IOPS` per volume
Up to 99.9% durability	Up to 99.9% durability

The high performance and also the most expensive.

Suitable for OLTP (Online Transaction Processing) and latency-sensitive applications.

This is not a SSD, it's an hard disk and it's optimized for large amounts of data.

Great for big data, databases, data warehouses, ETL and log processing.

Max throughtput of 500 MB/s per volume.

It cannot be a boot volume.

The lowest cost data available.

A good option for data that need to be accessed few times per day.

Max throughtput of 250 MB/s per volume.

It cannot be a boot volume.

IOPS	Throughtput
I/O operations per seconds	Number of bits read or written per seconds
Important metric for quick transactions, low latency apps	Important metric for large databases, large I/O size, complex queries
The ability to read and write very quickly	The ability to deal with large datasets
`Provisioned IOPS SSD (io1 or io2)`	`Choose Throughtput Optimized HDD (st1)`