一种使多库系统事务可串行化的方法  

An Approach to Ensuring Serializability of Concurrent Execution of Transactions in a Multidatabase System

作　　者：金远平[1] 

机构地区：[1]东南大学计算机系,南京210018

出　　处：《计算机研究与发展》1993年第9期17-21,共5页Journal of Computer Research and Development

摘　　要：在多库系统中,各局部数据库高度自治,全局事务与局部事务相互影响,使事务管理面临新的挑战。本文提出一种子事务统一释放资源方法,并证明只要局部DBMS遵守两段封锁协议,这种方法可以保证多库系统中的事务可串行化,同时还讨论不可检测的全局死锁问题及其处理。In a multidatabase system composed of local databases with high autonomy,both global and local transactions interfere with each other.This adds new difficulty to transaction management. In this paper,we propose a simple approach to this problem,and show that,as long as the local DBMS's obey 2PL protocol by making all the subtransactions of a global transaction release their resources only after all their operations have been done,the serializability of concurrent execution of transactions in the multidatabase system can be ensured.Also discussed are the undetectable global deadlock and its handling.

关 键 词：多数据库系统 异构数据库系统 事务管理 并发控制 可串行化 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]