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Lastbalanseringsalgoritmer: En utvärdering av lastbalanseringsalgoritmer i ett LVS-kluster där noderna har olika operativsystem
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
2012 (Swedish)Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
Abstract [sv]

Denna rapport behandlar en undersökning av olika lastbalanseringsalgoritmer i Linux Virtual Server. Undersökningen har gjorts i ett webbkluster (Apache var webbservern som användes) med tre heterogena noder, där operativsystemet var den detalj som skiljde dem åt. Operativsystemen som ingick i undersökningen var Windows Server 2008 R2, CentOS 6.2 och FreeBSD 9.0. De faktorer som undersöktes mellan de olika algoritmerna var klustrets genomsnittliga svarstid vid olika belastning och hur många anslutningar som kunde hanteras av klustret, detta gjordes med verktyget httperf.

Undersökningen ger svar på hur ett heterogent webbklusters genomsnittligasvarstid och arbetskapacitet kan skilja sig åt beroende på vilken algoritm som används för lastbalansering. Resultatet visar att den genomsnittliga svarstiden håller sig låg tills en hastig stigning inträffar. Shortest Expected Delay och Weighted Least-Connection Scheduling kunde hantera störst antal anslutningar.

Abstract [en]

This report covers an investigation of different load balancing algorithms in Linux Virtual Server. The investigation was done in a web cluster (with Apache as the software being used) consisting of three heterogeneous nodes, where the operating system was the detail that differentiated the nodes. The operating systems that were used in the investigation were Windows Server 2008 R2, CentOS 6.2 and FreeBSD 9.0. The factors examined were average response time at different load and how many connections the cluster could cope with, these factors were examined by measurements taken with the tool httperf.

The investigation gives an answer to how a heterogeneous web clustersaverage response time and working capacity can be affected by the choice of load balancing algorithm. The result shows that the average response time stays low until a sudden rise occurs. Shortest Expected Delay and Weighted Least-Connection Scheduling could handle the largest number of connections.

Place, publisher, year, edition, pages
2012. , p. 28
Keyword [en]
Clustering, load balancing, response time, Linux Virtual Server, Round Robin, Least-Connection Scheduling, Shortest Expected Delay, httperf.
Keyword [sv]
Kluster, lastbalansering, svarstid, Linux Virtual Server, Round Robin, Least-Connection Scheduling, Shortest Expected Delay, httperf.
National Category
Computer Sciences
Identifiers
URN: urn:nbn:se:lnu:diva-22283OAI: oai:DiVA.org:lnu-22283DiVA, id: diva2:565109
Subject / course
Computer Science
Educational program
IT Technician, 120 credits
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-11-08 Created: 2012-11-06 Last updated: 2018-01-12Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • asciidoc
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