Metadata optimization for network replication using representative of metadata batch

摘要

A target storage system receives a representative fingerprint and fingerprint representations from a source storage system. Each fingerprint representation contains only a portion of a corresponding fingerprint and the representative fingerprint is a full fingerprint. The fingerprints of the data chunks are missing at the target storage system are identified based on the fingerprint representative and the fingerprint representations. A bitmap is transmitted to the source storage system, each bit indicating whether one of the fingerprints is missing. One or more fingerprints are received from the source storage system that are missing at the target storage system based on the bitmask. One or more missing data chunks are identified based on at least the one or more fingerprints received from the source storage system. The missing data chunks are then received from the source storage system to be stored at the target storage system.