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Apache Dynamic Update for Feedback Control of Computing Resources
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DOI：10.1109/ACCESS.2019.2913531.png)
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Abstract
En 中文
This paper shows an environment for performing data collection in the computational system that provides the response service to HTTP requests and makes interventions in the values of the available parameters in order to control the system automatically in the closed loop. The parameters to be obtained as endogenous variables of the computational system are Max Request Works and Kepp Alive TimeOut, and the exogenous ones will be the amount of memory consumed and the percentage of processor occupation time. The tool developed modifies neither the source code of the response software to the clients' HTTP requests nor the operating system code of the host computer, being non-intrusive regarding original system configuration. A proportional-integral (PI) controller was designed in order to keep the average perceived time response of HTTP messages regulated. The experimental tests carried out on an Apache Web server show the improvement obtained on the system's time response.
Keywords:
HTTP protocol
apache web server
digital controller
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