NDLI: Adaptive admission control for web applications with variable capacity

Content Provider	IEEE Xplore Digital Library
Author	Mathur, V. Patil, P. Apte, V. Moudgalya, K.M.
Copyright Year	2009
Description	Author affiliation: Indian Institute of Technology-Bombay, Powai, Mumbai, Maharashtra 400076, India (Mathur, V.; Patil, P.; Apte, V.; Moudgalya, K.M.)
Abstract	The system capacity available to a multi-tier Web based application is often a dynamic quantity. Most static threshold-based overload control mechanisms are best suited to situations where the system's capacity is constant or the bottleneck resource is known. However, with varying capacity, the admission control mechanism needs to adapt dynamically. We propose and implement an adaptive admission control mechanism that adjusts the admitted load to compensate for changes in system capacity. The proposed solution is implemented as a proxy server between clients and front-end Web servers. The proxy monitors ‘black-box’ performance metrics-response time and rate of successfully completed requests (goodput). With these measurements as indicators of system state, we employ a control theory based feedback loop to dynamically determine the rate of admitted requests. The objective is to balance changes in response time and changes in goodput, while preventing overloads due to reduction in available system capacity. We evaluate our mechanism with experiments on a test-bed and find that it is able to maintain higher productivity than a static admission control scheme.
Starting Page	1
Ending Page	5
File Size	400056
Page Count	5
File Format	PDF
ISBN	9781424438754
ISSN	1548615X
e-ISBN	9781424438761
DOI	10.1109/IWQoS.2009.5201411
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Programmable control Adaptive control Admission control Control systems Web server Control theory Feedback loop Delay Testing Productivity
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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