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Increasing availability in existing software systems: An assessment of three-tier replication
Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
2004 (English)Independent thesis Advanced level (degree of Master (One Year))Student thesisAlternative title
Öka åtkomsten på befintliga mjukvarusystem : En utvärdering av tre-lagers-replikering (Swedish)
Abstract [en]

Architectural design decisions are known to be crucial for the success of a system in development. An early design decision will most likely be expensive to change at a later stage of the development if the software engineers needs to get back to the drawing board. If a quality attribute has been neglected during architectural design it may ruin the entire project. This work describes a way of increasing the availability of a software service, that have already been put into use, by adding a middle layer of replication logics represented by third party application servers and replicated Enterprise JavaBeans. The approach called Three-tier replication is assessed and compared to the origin architectural design by using a qualitative scenario based assessment. In addition, we have also implemented the new architectural design to be able to validate the assessment results. The validation is done by testing the scenarios on the two architectures. The software service used is an industrial system for sending text messages from computers to mobile phones.

Abstract [sv]

Tidiga designbeslut är extremt viktiga för utgången av ett utvecklingsprojekt. Felaktiga beslut kommer att kosta företaget eller organisationen mycket tid och pengar om det visar sig att de måste omarbetas. Detta arbetet beskriver ett sätt att öka åtkomsten på en tjänst genom att lägga till ett mellan-lager som sköter replikering av tjänstenoden. Relplikeringslogiken sköts av applikationsservrar och Enterprise Javabeans. Vi har använt ett befintligt industriellt system för att utveckla och jämföra metoden. Tjänsten ifråga är en SMS-tjänst för kommunikation mellan dator och mobil-telefon och vise versa.

Place, publisher, year, edition, pages
2004. , 25 p.
Keyword [en]
availability, software architecture assessment, cluster, Enterprise JavaBeans
National Category
Software Engineering
Identifiers
URN: urn:nbn:se:bth-5418Local ID: oai:bth.se:arkivexCA60446F7E9A3354C1256F4A0044A440OAI: oai:DiVA.org:bth-5418DiVA: diva2:832798
Uppsok
Technology
Supervisors
Available from: 2015-04-22 Created: 2004-11-12 Last updated: 2015-06-30Bibliographically approved

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fulltext(139 kB)23 downloads
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b5f7414c634e9769d2f699801f75e2c9bb55f74c26b2ea8f09448cb21df37a4a1e6d097c04a17a2e452d6eae03a9b671fc7078327672de48763c86ebc3b65828
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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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