Durability and Availability - AWS Storage Services Overview

Durability and Availability

Amazon S3 Glacier is designed to provide average annual durability of 99.999999999 percent (11 nines) for an archive. The service redundantly stores data in multiple facilities and on multiple devices within each facility. To increase durability, Amazon S3 Glacier synchronously stores your data across multiple facilities before returning SUCCESS on uploading an archive. Unlike traditional systems, which can require laborious data verification and manual repair, Amazon S3 Glacier performs regular, systematic data integrity checks and is built to be automatically self-healing.