AWS S3 Cross Region Replication

What are the constraints to enable S3 cross region replication?

To enable cross region replication, you should have two buckets:

Bucket 1 - should be in region A

Bucket 2 - should be in region B

Versioning should be enabled in both the buckets for replication.

Can you create same region replication?

Yes

Can you create cross account replication?

Yes

Can you replicate a subset of objects using replication?

Yes, you can limit the scope of the replication rules to specific prefixed/tags etc., You can also apply the rules to all the objects in the bucket

What is the expected delay in copying the files from the source to destination buckets in S3 replication?

A few seconds.

Can you replicate only the new objects?

The new objects can be replicated after enabling the replication rule. However, the already existing objects can also be replicated by enabling Replicate existing objects option.

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