MinIO AIStor server-side bucket replication is an automatic bucket-level configuration that synchronizes objects between a source and destination bucket. MinIO AIStor server-side replication requires the source and destination bucket be two separate MinIO AIStor clusters running the same Object Store version. For each write operation to the bucket, MinIO AIStor checks all configured replication rules for the bucket and applies the matching rule with highest configured priority. MinIO AIStor synchronizes new objects and object mutations, such as new object versions or changes to object metadata. This includes metadata operations such as enabling or modifying object locking or retention settings.