AWS announces Amazon DocumentDB I/O-Optimized

Today, we are announcing the general availability of [Amazon DocumentDB](https://aws.amazon.com/documentdb/) (with MongoDB compatibility) I/O-Optimized, a new storage configuration for database clusters that provides improved price performance and predictable pricing for customers with I/O-intensive applications. Amazon DocumentDB I/O-Optimized offers improved performance, increasing write throughput and reducing latency for customers’ most demanding workloads. With Amazon DocumentDB I/O-Optimized, there are zero charges for read and write I/O operations—you only pay for your database instances and storage usage, making it easy to predict your database spend up front. Amazon DocumentDB I/O-Optimized offers up to 40% cost savings for I/O-intensive applications where I/O charges exceed 25% of the total Amazon DocumentDB database spend. You can now choose between two storage configurations for every database cluster: Amazon DocumentDB Standard or Amazon DocumentDB I/O-Optimized. For applications with low-to-moderate I/Os, Amazon DocumentDB Standard is a cost-effective option. For applications with high I/Os, Amazon DocumentDB I/O-Optimized provides improved price performance, predictable pricing, and up to 40% cost savings. You can switch your cluster with a single click in the [AWS Management Console](https://console.aws.amazon.com/docdb) or with a command through the [AWS Command Line Interface](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/docdb/index.html) once every 30 days and switch back to Amazon DocumentDB Standard at any time. Amazon DocumentDB I/O-Optimized is available on DocumentDB 5.0 instance-based clusters. You can use [in-place major version upgrade (MVU)](https://docs.aws.amazon.com/documentdb/latest/developerguide/docdb-mvu.html) to upgrade your version to DocumentDB 5.0. For pricing and regional availability see [Amazon DocumentDB pricing page](https://aws.amazon.com/documentdb/pricing/). To learn more about the feature, visit [storage configuration](https://docs.aws.amazon.com/documentdb/latest/developerguide/db-cluster-storage-configs.html) in our developer guide.