计算机科学 ›› 2017, Vol. 44 ›› Issue (Z6): 459-462.doi: 10.11896/j.issn.1002-137X.2017.6A.103
唐旭,王飞,李彤,张鹏
TANG Xu, WANG Fei, LI Tong and ZHANG Peng
摘要： 针对数据中心对信息实时交换系统实时可靠传输数据流的应用需求,分析了数据中心传输数据流的特点,设计了实时交换系统架构,重点研究了信息系统可靠、实时传输数据的方法。采用线程控制模块和消息同步阻塞I/O模型实现了并发数据流的处理,基于循环缓存机制和双系统同步技术解决了突发数据流易丢包的难题,保证了系统的可靠性。为了确保经过数据中心的数据流的实时传输,减少系统处理过程中产生的时延,提出了QPTS(队列优先级驱动的任务调度)算法。该算法兼顾优先级、截止时间和剩余包数,实现了数据流的按需调度,提高了系统对交换数据流的处理速度。测试结果验证了算法的有效性以及系统的实时性和可靠性。
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