基于环境一致性的分布式并行数据更新协议  

AN UPDATING PROTOCOL FOR DISTRIBUTED AND PARALLEL DATA BASED ON DATA ENVIRONMENT CONSISTENCY

作　　者：陈建英[1,2] 刘心松[1] 张楠[2] 殷锋[2] 

机构地区：[1]电子科技大学计算机科学与工程学院,四川成都610054 [2]西南民族大学计算机科学与技术学院,四川成都610041

出　　处：《计算机应用与软件》2011年第6期164-166,共3页Computer Applications and Software

基　　金：四川省应用基础研究项目(2008JY0070-2)

摘　　要：为了保证服务器节点完全对等的分布式并行数据库系统更新结果一致性,提出基于数据环境一致性的分布式并行更新协议DEC-DP2PC(Distributed and Parallel 2PC Based on Data-Environment-Consistency),对经典2PC(two phase commit)在执行条件、表决内容和次数、全局提交和撤销定义等方面进行了针对性改进。性能分析和测试表明,DEC-DP2PC可有效过滤数据副本分布和版本号等数据环境信息不一致情况下事务的执行,减少全局数据环境一致性维护开销和降低系统平均响应时间。To guarantee the updating consistency of distributed and parallel database system which has fully peer to peer characteristic among server nodes,a new distributed and parallel updating protocol DEC-DP2PC based on consistency of data environment is put forward.Pertinent improvement has been conducted on traditional two phase commit protocol in executing precondition,voting contents and times,overall commit/rollback definition,etc.Analysis and test on its performance illustrate that the DEC-DP2PC can effectively filter transactions in inconsistent data environment caused by data distribution,different replica versions as well as other factors.Meanwhile,it achieves low maintenance cost in overall data environment consistency and lower average system response time.

关 键 词：分布式并行数据库 同步更新 数据环境 一致性 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]