实时数据库系统的并发控制策略及其实现

Multiclass Concurrency Control Algorithm and Implementation in RTDBS

讨论了解决实时与非实时事务冲突的2级并发控制策略，分析了依序共享2段锁协议和嵌套事务封锁协议，给出了RTDBS中用以控制嵌套实时事务并发执行的RCZPL－OS协议．

This paper discusses the multiclass concurrency control algorithm which can be used to resolve the conflicts betweeL the real,time transactions and non-real-time transac-tions. Also it addresses the 2PL-OS and nested transactions,and the protocol of 2PL-OS ap-plied in nested real-time transactions of RTDBS is proposed.