6.In this paper, the problem of detection and prevention of deadlock in DDBMS is studied in detail.And a locking/unlocking protocol and its algorithm using the state transiting diagram are presented.

• 本文对分布式数据库中死锁的检测与预防进行了充分的研究,并给出了相应的状态转换图以及有关的封锁/开锁协议与算法。