What Redundancy Storage Techniques Does OBS Use?

OBS uses the Erasure Code (EC) algorithm, instead of multiple copies, to ensure data redundancy.

Compared with the multi-copy redundancy, EC delivers a higher storage space utilization while maintaining the same reliability level.

A bucket with single-AZ storage uses the EC algorithm for data redundancy among nodes in one AZ. A bucket with multi-AZ storage not only ensures redundancy for the data among nodes in an AZ, but also across multiple AZs.

Parent topic: Durability and Availability

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