Zero-copy Replication for ReplicatedMergeTree on S3 Storage

Why it matters

This feature eliminates the need to copy data parts during replication between ReplicatedMergeTree replicas on S3-backed storage, significantly improving replication speed and reducing network and storage overhead.

How to use it

Enable zero-copy replication by configuring your ReplicatedMergeTree tables to use S3 storage as the underlying data layer. Ensure the configuration supports shared S3 storage usage among replicas to benefit from zero-copy replication.