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.
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