Durability and Availability - AWS Storage Services Overview

Durability and Availability

Amazon S3 Standard storage and Standard-IA storage provide high levels of data durability and availability by automatically and synchronously storing your data across both multiple devices and multiple facilities within your selected geographical region. Error correction is built-in, and there are no single points of failure. Amazon S3 is designed to sustain the concurrent loss of data in two facilities, making it very well suited to serve as the primary data storage for mission-critical data. In fact, Amazon S3 is designed for 99.999999999 percent (11 nines) durability per object and 99.99 percent availability over a one-year period.

Additionally, you have a choice of enabling cross-region replication on each Amazon S3 bucket. Once enabled, cross-region replication automatically copies objects across buckets in different AWS Regions asynchronously, providing 11 nines of durability and 4 nines of availability on both the source and destination Amazon S3 objects.