Database Synchronous Replication Model Based on Write Operations Set

Most of current Database Management System(DBMS) provide a mater and slave asynchronous replication mechanism,when the master node fails,the whole system will breakdown,and the potential delay between mater and slave will causes data lose.This paper provides a write set based synchronous database replication model on the basis of group communication replication,which can solve the delay problem,and improve the availability and extendibility in distributed databases.