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- Kihl, MariaLund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH (author)
Control-theoretic Analysis of Admission Control Mechanisms for Web Server Systems
- Article/chapterEnglish2008
Publisher, publication year, extent ...
- 2007-08-15
- Springer Science and Business Media LLC,2008
- electronicrdacarrier
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- LIBRIS-ID:oai:lup.lub.lu.se:9013a3bf-28e1-407c-a578-f3713b77c587
- https://lup.lub.lu.se/record/792890URI
- https://doi.org/10.1007/s11280-007-0030-0DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- Web sites are exposed to high rates of incoming requests. The servers may become overloaded during temporary traffic peaks when more requests arrive than the server is designed for. An admission control mechanism rejects some requests whenever the arriving traffic is too high and thereby maintains an acceptable load in the system. This paper presents how admission control mechanisms can be designed with a combination of queueing theory and control theory. In this paper we model an Apache web server as a GI/G/1-system and then design a PI-controller, commonly used in automatic control, for the server. The controller has been implemented as a module inside the Apache source code. Measurements from the laboratory setup show how robust the implemented controller is, and how it corresponds to the results from the theoretical analysis.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik hsv//swe
- ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
- TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Reglerteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Control Engineering hsv//eng
- queueing theory
- control theory
- system design
- admission control
Added entries (persons, corporate bodies, meetings, titles ...)
- Robertsson, AndersLund University,Lunds universitet,Institutionen för reglerteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Automatic Control,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)cont-aro (author)
- Andersson, MikaelLund University,Lunds universitet,Institutioner vid LTH,Lunds Tekniska Högskola,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)tele-man (author)
- Wittenmark, BjörnLund University,Lunds universitet,Institutionen för reglerteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Automatic Control,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)cont-bwi (author)
- Institutionen för elektro- och informationsteknikInstitutioner vid LTH (creator_code:org_t)
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- In:World Wide Web: Springer Science and Business Media LLC11:1, s. 93-1161386-145X1573-1413
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