Methods, devices and computer programs for optimizing the replication of data in computer systems

摘要

The replication of data between a source system and a destination system is disclosed. After having calculated a signature for a fragment of data to be replicated, the source system transmits same to the destination system. The latter determines whether or not the signature is known, e.g., whether or not a fragment is associated with the signature. If so, the data to be replicated is reconstructed (with respect to fragment in question). If not, a message indicating that the signature is unknown is transmitted to the source system, which then transmits the corresponding fragment to the destination system. The latter stores and reconstructs the data to be replicated (with respect to the fragment in question).

主权项

1. A method using a computer for the replication of at least one data item in the form of at least one fragment between a source system and at least one destination system, the source system and the at least one destination system being communicatively coupled to each other by a communication link, the method implemented in the source system comprising:
calculating a signature of the at least one fragment of the at least one data item to be replicated; determining an indication of origin of the at least one data item; transmitting the signature along with the indication of origin of the at least one data item to the at least one destination system; and upon receiving a message from the at least one destination system, in response to the transmission of the signature, indicating that the at least one signature is unknown, transmitting the at least one fragment to the at least one destination system such that the fragment is only transmitted to the at least one destination system when the signature is considered unknown.