基于组通信技术的数据库复制技术研究与应用-《计算机技术与发展》

文章信息/Info

Title:: Research and Application of Database Replication Based on Group Communication Technology

Keywords:: database replication; group communication; atomic broadcast; consistency

摘要:: 针对分布式数据库系统中多节点数据复制存在的响应时间长、通信消耗大的问题,利用组通信技术中的消息定序特性,提出一个基于组通信技术的数据库复制协议.该协议将各节点的事务与组通信中的原子广播技术相结合,使节点上所有事务的执行达到可串行化,严格保证分布式数据库系统多节点数据的一致性.试验结果表明,相对于传统的两阶段锁2PL的同步复制策略,该同步模型在保证组成员节点的数据一致性前提下,减少了系统中数据库复制的通信量,避免了复制过程中的死锁,提高了同步复制的效率

Abstract:: In view of problems of long response time and large communication consumption existed in node data copy in distributed data-base system,using the news sequencing characteristics of group communication technology,put forward a database replication protocol based on group communication technology. This principle combines the transaction on each node with the technology of atomic broad-cast,provides one-copy-serializability for execution of all affairs and guarantees the data consistency of the system strictly. Experimental results show that compared with traditional 2PL synchronization replication strategy,this model reduces the traffic of replication,avoids the deadlock in the process of reproduction,and improves the efficiency of eager replication