DATA REPLICATION METHOD AND DATA STORAGE SYSTEM FOR PROCESSING STATE MACHINE BASED REPLICATION GUARANTEEING CONSISTENCY OF DATA AND DISTRIBUTED RECOVERY USING CHECK POINT DATA AND REPLICATION LOG

摘要

Disclosed are a data replication method for processing replication based on a state machine securing data coherence and processing distributed recovery by using check point data and a replication log, and a data storage system. The data replication method performs a calculation, with a method of a first-in-first-out order, performed in two memory storages by using a characteristic that a state transition of the memory storage, which means a state group of stored data, is definitely occurred by a calculation on the memory storage, and a result of the calculation is the same as well, thereby performing replication which secures coherence between two memory storages.