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适用于广域测量系统的实时数据并发访问同步算法

DOI: 10.13334/j.0258-8013.pcsee.2014.19.024, PP. 3226-3233

Keywords: 广域测量系统,内存数据库,同步,并发访问,可控粒度

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Abstract:

由于广域测量系统(wideareameasurementsystem,WAMS)海量实时数据的大规模、高负荷并发访问,其采用的同步机制在很大程度上约束了系统的效率。针对于目前普遍使用的整体锁定机制带来的由于访问串行化导致的效率低下问题,提出了粒度可控并发访问同步算法(controllablegranularityconcurrencysynchronization,CGCS),该方法使用控制标志位建立基于子集超集依赖的锁定条件和先进先出等待队列,并可控锁定级别,实现对实时数据访问的互斥粒度粗细的任意控制,同时作用于整体文件、表、元组,进而任务可以最大化地并发执行。通过实验,给出了系统的并发处理能力和IO响应能力的测试过程和结果,证明了CGCS算法在并发高、访问散的情况下能充分发挥CPU的并行处理能力,使WAMS系统的效率得到大幅提升。

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