Uravnoteženje opterećenja u raspodijeljenom WWW poslužitelju

scientific master's theses

• Title (english): Load balancing in the distributed WWW server
• Author: Robert Kostelac
• Mentor: Ignac Lovrek (mentor)
• Committee member: Ignac Lovrek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Telecommunications); Zagreb
• Defense date and country: 2000, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Telecommunications and Informatics
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

Rad predstavlja model skupine distribuiranih Web poslužitelja, čije se optere ćenje raspodjeljuje korištenjem genetičkog algoritma. Uz prikaz osnovnih modela uravnoteženja koji se danas koriste, uvodi se i model DNS-om distribuiranog Web poslužitelja. Opisan je model genetičkog algoritma koji bi se koristio za uravnoteženje opterećenja, te metoda završnog raspoređivanja skupine Web poslužitelja. Provedena je simulacija čitavog sustava programom "Web Load Balancing Simulator", koji je posebno napravljen upravo za ispitivanje ponašanja predviđenog sustava. Rezultati dobiveni simulacijom su uspoređivani paralelno na Round-Robin metodi i predloženi algoritam koji koristi svojstva genetičkog algoritma prilikom pronalaženja optimalnih rezultata. Rezultati dobiveni simulacijom su pokazali da predloženi algoritam pokazuje bolja svojstva raspodjele korisničkih zahtjeva po raspoloživim Web poslužiteljima. Daljnja istraživanja mogla bi se bazirati upravo u pravcu kombinacije više postojećih tehnika distribucije korisničkih poziva, te njihovoj mogućoj implementaciji na nekom postojećem sustavu, kao i na radu različitih raspoloživih tehnika u distribuiranom okruženju.

Abstract (english)

The thesis presents a model of clustered distributed Web Servers, whose total load is balanced by using genetic algorithm. With the presentation of basic load balancing models used for this problem, DNS distributed Web Server is described. A model of genetic algorithm for load balancing the requests is introduced, including the method for final balancing of clustered Web servers. A simulation of the system presented is made using "Web Load Balancing Simulator", which is the program specially designed for testing the presented system. The results from this simulation were compared with the Round-Robin algorithm. The results from this simulation have shown that suggested method that use the genetic algorithm produces far more better solutions for distributing the user requests among Web Servers in the cluster. Further research can be based in the direction of combining more existing techniques of distributing user requests, and their implementation on existing systems, as the behavior of the existing techniques in the distributed systems.

• Keywords: Genetički algoritam; podjela opterećenja; WWW poslužitelj; DNS poslužitelj
• Keywords (english): Genetic algorithm; load balancing; WWW server; DNS server
• Language: croatian
• URN:NBN: urn:nbn:hr:168:636321
• Study programme: Title: Postgraduate master programme in electrical engineering; Study programme type: university; Study level: postgraduate; Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-04-02 09:24:37