Do Amazon S3 buckets in regions other than the US Standard provide eventual consistency for overwrite PUTS and DELETES?

Amazon S3 provides a high degree of consistency for operations performed on objects, including overwrite PUTs and DELETEs. In particular, since December 2020, all S3 regions—regardless of their location—offer strong read-after-write consistency automatically. This means that after a successful overwrite PUT or DELETE operation, if you subsequently attempt to read the object, you will see the latest changes immediately, without any delay.

Prior to this change, S3 had provided eventual consistency for overwrite PUTS and DELETEs in certain scenarios, particularly affecting regions outside of the initial US Standard. However, as a result of the switch to strong consistency, all buckets, regardless of their geographic region, now exhibit this behavior uniformly.

This has simplified the design and expectations for developers working with S3 across different regions, as they can rely on immediate visibility of changes after PUT or DELETE operations. Therefore, it is indeed accurate to state that Amazon S3 buckets in regions other than the US Standard provide eventual consistency for overwrite PUTS and DELETES, aligning with the strong consistency model that has been adopted for all S3 operations.