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Lock Downgrading: An Approach to Increase Inter-transaction Parallelism in Advanced Database Applications

机译:锁定降级:在高级数据库应用程序中增加交易间并行性的方法

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In this paper, we propose a concurrency control protocol, denoted Cooperative Locking, which extends the two-phase locking protocol by introducing the notion of downgrading of locks proposed in [9]. The basic idea of the proposed protocol is to provide the following functionality: after using an object in a transaction, the user can downgrade a lock on an object to a less restrictive mode before the transaction ends its execution. The prime goal of our proposal is to provide a high degree of inter-transaction parallelism while ensuring serializability of schedules.
机译:在本文中,我们提出了一种并发控制协议,表示配合锁定,其通过引入[9]中提出的锁的降级的概念来扩展双相锁定协议。所提出的协议的基本思想是提供以下功能:在交易中使用对象之后,用户可以在事务结束其执行之前将锁对象上的锁定到更少的限制模式。我们提案的主要目标是提供高度的交易间并行性,同时确保计划的顺序。

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