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Utformning av en lastbalanserad och högtillgänglig tjänsteplattform
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
2005 (Swedish)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Designing a load balanced and highly available service platform (English)
Abstract [sv]

Sveriges meteorologiska och hydrologiska institut (SMHI) har flertalet varningstjänster som via Internet levererar prognoser till myndigheter, som exempelvis räddningsverket (SRV), och allmänhet där det ställs extra höga krav på tillgänglighet.

I strävan att öka driftsäkerheten är man på SMHI intresserade av att införa lastbalansering av olika kritiska tjänster. Man ser flertalet fördelar med en sådan lösning, bland annat ökad driftsäkerhet, minskad känslighet för belastningstoppar, ökade möjligheter till service och underhåll av systemen samt ett mindre behov av akutinsatser från systemadministratör.

Detta examensarbete har inom SMHI resulterat i ökad förståelsen för olika lastbalanseringsteknikers möjligheter och begränsningar. Vidare har det gett rekommendationer vad gäller införskaffande av lastbalanseringsprodukter samt tagit fram en lösning för enkel serverlastbalansering som skall kunna integreras med SMHI-Linux (SMHI:s standardiserade Linuxplattform med en definierad uppsättning applikationer och verktyg).

Den framarbetade lösningen har på prov implementerats tillsammans med den nya webbplattform som är under framtagande. För att undersöka detta systems prestanda, skalbarhet och robusthet har det genomförts ett antal tester.

Abstract [en]

The Swedish Meteorological and Hydrological Institute (SMHI) have a variety of weather monitoring services that issue warnings and forecasts via the Internet. These services are used by authorities such as The Swedish Rescue Services Agency (SRSA). The services are also offered to the public or anyone that has use for them.

In their strive to raise the reliability of their services, SMHI investigate several load balancing options for their most critical services. Many advantages come in hand with such a solution - higher availability, better handling of excessive load and increased level of service and maintenance for all systems, thus lowering the need for emergency response from the system administrator.

The purpose of this master thesis is to raise the knowledge of load balancing systems within SMHI. This includes explaining different load balancing techniques and their pros and cons, give recommendations on investment in such products and to give a solution for easy-to-use server load balancing integration with SMHI-Linux (a Linux platform standardized for SMHI with a defined set of applications and tools).

The recommended load balancing solution has been implemented on a test basis together with a new web based platform, which is still under development. In order to investigate system performance, scalability and robustness several tests have been conducted.

Place, publisher, year, edition, pages
2005. , 24 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-97928ISRN: LITH-ITN-MT-EX--05/058--SEOAI: oai:DiVA.org:liu-97928DiVA: diva2:652950
Subject / course
Media Technology
Supervisors
Examiners
Available from: 2013-10-02 Created: 2013-09-23 Last updated: 2013-10-02Bibliographically approved

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CiteExportLink to record
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