Replication

• Replication enables automatic, asynchronous copying of objects across Amazon S3 buckets.

• Buckets can be owned by the same AWS account or by different accounts.

• Destination buckets can be in different AWS Regions or within the same Region as the source bucket.

• Must enable versioning on both buckets.

When to use CRR (Cross-Region Replication)

• Meet compliance requirements - Compliance requirements might require that you store data very far away.

• Minimize latency.

• Increase operational efficiency.

When to use SRR (Same-Region Replication)

• Aggregate all your logs into a single bucket.

• Live replication between production and test accounts - Can replicate objects between multiple accounts.

• Abide by data sovereignty laws - Might be required to store multiple copies of your data in separate AWS accounts within a certain Region.