基于iSCSI协议的调度算法性能比较

Performance Evaluation of Different Scheduling Algorithms with iSCSI Traffic

由于iSCSI协议对于网络的低层没有特别的定义,而各种队列调度算法因其设计目的不同所以在各种特性上表现迥异.文中以仿真的方式,对基于iSCSI数据流的不同队列调度算法进行了性能评估.主要应用网络仿真软件ns-2建立模型和仿真场景,以相同的网络环境,应用Drop Tail、FQ、WFQ和SRR等算法作大量的反复仿真,对所得数据进行统计分析,得到以时延、时延抖动、速率、速率抖动为指标的性能参数.分析比较这些参数的结果,可为iSCSI的其他应用及研究提供参考.

Since iSCSI protocol does not specify the lower layers, but scheduling algorithms specialize on various given purpose perform differently, the paper is centered on simulative evaluation of some scheduling algorithms with iSCSI traffic. Models and scenarios were built on ns-2, and large-numbered simulations were repeated under certain network circumstances with Drop Tail, FQ, WFQ and SRR scheduling algorithms to collect data. The statistical analysis was applied to gain conclusions on delay, delay jitter, rate and rate jitter which is the main achievement of this article, and can be a reference for iSCSI applications and researches.