NDLI: Multiple-Resource Request Scheduling for Differentiated QoS at Website Gateway

Content Provider	IEEE Xplore Digital Library
Author	Ying-Dar Lin Ching-Ming Tien Shih-Chiang Tsao Ruo-Hua Feng Yuan-Cheng Lai
Copyright Year	2008
Description	Author affiliation: Nat. Chiao Tung Univ., Hsinchu (Ying-Dar Lin; Ching-Ming Tien; Shih-Chiang Tsao; Ruo-Hua Feng)
Abstract	Differentiated quality of service is a way for a website operator to provide different service levels to its clients. Traditional HTTP request scheduling schemes can achieve this, but they schedule requests to manage only one server resource, such as CPU or disk I/O. Actually, processing a request on the server will consume multiple resources. This paper presents a multiple-resource request scheduling algorithm, called mQoS, for differentiating the utilization of the server resource. The mQoS scheduler consists of several sub-schedulers and a main scheduler. Each sub-scheduler manages a server resource to differentiate its utilization among the classes. The main scheduler checks the availability of every server resource and triggers an appropriate sub-scheduler to balance the utilization of server resources. The implementation of the mQoS gateway is based on Squid and Linux. The evaluation compares the mQoS scheduling with no scheduling (nQoS) and single-re source request scheduling (sQoS). The mQoS scheduling reveals the accurate differentiation on every server resource. In addition, the total server throughput in the mQoS scheduling is improved by 21%, compared with the sQoS scheduling. The average user-perceived latency of the mQoS scheduling is also shorter than other scheduling.
Starting Page	433
Ending Page	440
File Size	451212
Page Count	8
File Format	PDF
ISBN	9780769530956
ISSN	1550445X
DOI	10.1109/AINA.2008.16
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-03-25
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resource management Web server Processor scheduling Quality of service Scheduling algorithm Throughput Availability Delay Bandwidth Counting circuits service differentiation Multiple resources request scheduling
Content Type	Text
Resource Type	Article

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