Chapter 5 Inventory Control Subject to Unknown Demand 热度: 相关推荐 1 Chapter9: ConcurrencyControl 2 … DB (consistency constraints) 3 •可串行性serializability •冲突可串行性Conflict- serializability DBMS调度器控制并发
据库系统中的数据是由DBMS统一管理和控制的,为了适应数据共享的环境,DBMS必须提供数据保护能力,以保证数据库中数据的安全可靠和正确有效。 上传者:sarahlj1987时间:2010-10-25 基于分布式数据库系统的并发控制方法应用研究.pdf #资源达人分享计划# 上传者:u013883025时间:2021-08-09 ...
1.Introduction concurrency:DBMSstypicallyallowmanytransactionstoaccessthesamedatabaseatthesametime.time.concurrencycontrolmechanism:ensurethatconcurrenttransactionsdonotinterferewitheachother.other.Lecture05 Page2 2.ThreeConcurrencyProblems Thelostupdateproblem(丢失修改)丢失修改)Theuncommitteddependencyproblem(读“脏”...
MVCC is currently the best approach for supporting txns in mixed workoads of 数据库领域,见参考1 Concurrency Control 常见方案 lock based, Two-Phase Locking (2PL) time order based, Timestamp Ordering (T/O) If TS(Ti) < TS(Tj), then the DBMS must ensure that the execution schedule ...