基于在线识别的Web QoS自适应控制

2009 International Conference on Environmental Science and Information Application Technology Pub Date : 2011-03-26 DOI:10.1109/ICIST.2011.5765116

Ji Zhao, Juan Mei, Xiaojian Yang

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引用次数: 1

摘要

本文设计并实现了一种基于在线辨识的Web QoS自适应控制，根据系统模型的变化动态调整比例积分(PI)控制器的参数。为了实现允许控制，引入了一种基于会话的允许时间比反馈控制机制，该机制对服务器在控制期内可以接受的请求数量进行管理。对Apache Web服务器的仿真结果与固定PI控制器的对比表明，基于在线系统识别的自适应控制能够在过载情况下更有效地控制服务器的系统资源，进一步提高服务质量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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An adaptive control of Web QoS based on online identification

In this paper an adaptive control of Web QoS based on online identification is designed and implemented which dynamically adjust parameters of proportional-integral (PI) controller according to the changes of system model. In order to achieve admission control a session-based admission time-ratio feedback control mechanism is introduced which manages the amount of requests that the server can accept during the control period. The simulation results of Apache Web server compared with fixed PI controller demonstrate that the adaptive control based on online system identification is able to control the system resources of the server more effectually in case of overload and further improves the service quality.

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2009 International Conference on Environmental Science and Information Application Technology

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