De-Duplication-Based Remote Replication Method, and Apparatus

摘要

A de-duplication-based remote replication method and an apparatus are provided in a system including a primary end device and a disaster recovery end device, and both the primary end device and the disaster recovery end device store a first snapshot; the primary end device obtains a second snapshot of the primary end device, and sends the first data block, the fingerprint of the first data block, and metadata of the added data blocks to the disaster recovery end device when a fingerprint of a first data block in the added data blocks is different from the fingerprints of the data blocks in the first snapshot.