Modeling requirements for technical resources of an e-learning system

• Autorzy: Sieniawski, L.
• Języki publikacji: EN

Abstrakty

EN

The aim of this paper is to introduce a method of estimating requirements for resources of an e-learning platform which are important from the point of view of a reception quality (perceived quality) evaluation of educational services provided by the platform. It is assumed that the modeling process is based on real Web navigation scenarios the results of which have been stored as the logs produced by different parts of the software involved in putting the e-learning functions into effect. Moreover, some additional data could be obtained by slight modifications of a system software. In the paper, two educational portals are used as sources of example data describing the behaviour of corresponding e-learning systems due to service requests. It is shown how to effectively determine empirical probability distributions and corresponding statistics for the size and rate of files delivered by the Web server in response to requests, and the amount of RAM and CPU time consumed for the interpretation of scripts. That knowledge allows better estimation of the required capacity and performance of the platform.

Słowa kluczowe

EN

e-learning system; web service; technical resources; requirements; modeling

• Czasopismo: Systems Science
• Rocznik: 2010
• Tom: Vol. 36, no 4
• Strony: 93-103
• Opis fizyczny: Bibliogr. 5 poz., tab.,rys.

Twórcy

autor

Sieniawski, L.

• Wrocław University of Technology, Distance Education Division, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland,

Bibliografia

• [1] Apache HTTP Server Project, Apache Module mod_log_ config, http://httpd.apache.org/ docs/2.0/mod/mod_log_ config.html
• [2] Bauer B., Patrick A.S., A Human Factors Extension to the Seven-Layer OSI Reference Model, http://www.andrewpatrick.ca/OSl/ 101ayer.html [2011-10-08]
• [3] Lighttpd project home page. Module mod_accesslog, http://redmine. lighttpd.net/projects/lighttp d/wiki/Docs:ModA ccessLog
• [4] Moodle project home page, http://moodle.org
• [5] Sygula A., What say the education platform logs about. Possibilities to personalize e-learning courses based on system logs, 10th Virtual University Conference. Model, Tools, Practice, Warsaw, Poland, June 16-18, 2010 (in Polish).