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Tradeoffs Between Quality Attributes in a Large Telecommunication System
Blekinge Institute of Technology, Department of Software Engineering and Computer Science.
2002 (English)Independent thesis Advanced level (degree of Master (One Year))Student thesis
Abstract [en]

Modern telecommunication applications must provide high availability and performance. They must also be maintainable in order to reduce the maintenance cost and time-to-market for new versions. Previous studies have shown that the ambition to build maintainable systems may result in very poor performance. Here we evaluate an application called SDP pre-paid and show that the ambition to build systems with high performance and availability can lead to a complex software design with poor maintainability. We show that more than 85% of the SDP code is due to performance and availability optimizations. By implementing a SDP prototype with an alternative architecture we show that the code size can be reduced with an order of magnitude by removing the performance and availability optimizations from the source code and instead using modern fault tolerant hardware and third party software. The performance and availability of the prototype is as least as good as the old SDP. The hardware and third party software cost is only 20-30% higher for the prototype. We also define three guidelines that help us to focus the additional hardware investments to the parts where it is really needed.

Place, publisher, year, edition, pages
2002. , 10 p.
Keyword [en]
Maintainability, Availability, Performance
National Category
Computer Science
Identifiers
URN: urn:nbn:se:bth-4258Local ID: oai:bth.se:arkivex8DA13D354F8A18D4C1256B6E007ED7CEOAI: oai:DiVA.org:bth-4258DiVA: diva2:831587
Uppsok
Technology
Supervisors
Available from: 2015-04-22 Created: 2002-03-01 Last updated: 2015-06-30Bibliographically approved

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fulltext(252 kB)30 downloads
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File name FULLTEXT01.pdfFile size 252 kBChecksum SHA-512
2a96d44864da4fc0a8fae004d86f737a019d0282c2a238b5c56586e15a18efd554eaeaae42422a6587be6619f52ec7efcfb4d6fb8c01a8ac6eab9e8034597e8a
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Department of Software Engineering and Computer Science
Computer Science

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CiteExportLink to record
Permanent link

Direct link
Cite
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
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf