# Replication

* Replication enables **automatic, asynchronous copying of objects across Amazon S3 buckets**.<br>
* Buckets can be **owned by the same AWS account or by different accounts**.<br>
* Destination buckets **can be in different AWS Regions or within the same Region as the source bucket**.<br>
* **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.<br>
* **Minimize latency**.<br>
* **Increase operational efficiency**.

## When to use SRR (Same-Region Replication)

* **Aggregate all your logs into a single bucket**.<br>
* **Live replication between production and test accounts** - Can replicate objects between multiple accounts.<br>
* **Abide by data sovereignty laws** - Might be required to store multiple copies of your data in separate AWS accounts within a certain Region.