S3 Replication

Learn how to enable cross-region and same-region replication in S3 buckets.

In computing and data management, replication refers to creating and maintaining copies of data, objects, or systems in multiple locations. The primary goal of replication is to enhance data availability, fault tolerance, and performance by ensuring that identical copies of data are distributed across different locations or systems.

Replication in S3 buckets

Amazon S3 buckets allow us to asynchronously replicate objects from the source to the target bucket. S3 allows us to replicate objects between buckets in similar or different accounts and regions. Also, we can set up multiple destination buckets for replication.

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A commonly asked question is why we use S3 replication when we can conveniently upload objects manually to replicate them. Well, S3 replication is helpful in a bunch of cases:

  • Replicate objects with metadata: S3 replication copies objects along with the original metadata, such as creation made, modification date, and more.

  • Time-bound replication: To meet the compliance requirements, we might need to replicate objects in a limited time. S3 replication offers Replication Time Control (RTC) which ensures replication of 99% of the object within 15 minutes.

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  • Replicate to multiple storage ...