US Patent 10496668 Optimized tender processing of hash-based replicated data

A system, computer program product, and computer-executable method of optimizing replication between a first Content Addressable Storage (CAS) system and a second CAS system, the system, computer program product, and computer-executable method including analyzing the first CAS system and the second CAS system to determine an amount of differences between the first CAS system and the second CAS system, upon determining that the amount of differences are below a threshold amount, sending a set of replication information to the second CAS system, wherein the set of information includes a first address and a first hash for a portion of data stored on the first CAS system, analyzing, at the second CAS system, the set of replication information to determine whether to request that the first CAS system send data associated with the set of replication information; upon a negative determination, sending the data associated with the set of replication information.