Patent ID: 6751674
Filing Date: 2004-06-15
Classification: H04L,Y10S

Abstract:
A method of replicating data between a first multiple master server and a second multiple master server, said first and second multiple master servers in a hybrid network having a plurality of multiple-master servers and a plurality of single-master servers, wherein furthermore, the first multiple master server is emulating a primary server for replication by the plurality of single master servers in the hybrid network, the method comprising:updating the first multiple master server from the second multiple master server; updating the second multiple master server from first multiple master server; copying a change-log of the first multiple master server to a temporary copy on the second multiple master server, the change-log representing a time dependent order of the history of replication changes that have occurred on the first multiple master server and including information about replications with multiple master servers other than the second multiple master server; setting a checkpoint-flag if no changes were made to either server during said updating steps; and adopting the temporary copy of the change-log of the first multiple master server on the second multiple master server as the change-log of the second multiple master server if the checkpoint-flag is set.