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Author:Boye, Magnus
Title:Measuring Websites from a Global Perspective
Publication type:Master's thesis
Publication year:2014
Pages:v + 82      Language:   eng
Department/School:Tietoliikenne- ja tietoverkkotekniikan laitos
Main subject:Networking Technology   (S3029)
Supervisor:Ott, Jörg
Instructor:Sarolahti, Pasi
Electronic version URL: http://urn.fi/URN:NBN:fi:aalto-201403061524
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
Instructions

Reading digital theses in the closed network of the Aalto University Harald Herlin Learning Centre

In the closed network of Learning Centre you can read digital and digitized theses not available in the open network.

The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/

You can read theses on the Learning Centre customer computers, which are available on all floors.

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Opening a thesis

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    Aalto Thesis Database

  • Click on the icon to search for and open the thesis you are looking for from Aaltodoc database. You can find the thesis file by clicking the link on the OEV or OEVS field.

Reading the thesis

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Printing the thesis

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  • Other customers can use the printer u90203-psc3. All printing is subject to a charge to non-University members.
Location:P1 Ark Aalto  999   | Archive
Keywords:active measurements
DNS
HTTP
CDN
websites
Abstract (eng):Since the invention of the World Wide Web the content and services provided on the web have changed significantly.
In search of cost savings governments and businesses push online services, and the web has therefore become ever more important to many people.
It is therefore important to understand the performance of web page delivery, in order to improve the user experience of the web.
The goal of this Master's thesis is to evaluate the network performance of web page delivery in relation to content distribution networks.We use the global measurement platform PlanetLab to perform active measurements of the performance of DNS and HTTP when downloading web pages.
Domain names are resolved using iterative resolution, Google DNS, OpenDNS, and the default DNS server of measurement nodes.
This enables us to asses how the choice of DNS resolver affects CDN server selection.
The measurements reveal that network latency has the greatest impact on DNS resolution time and that nearby DNS servers will generally have the lowest resolution time.
We developed an effective method of identifying CDNs and applied it to the measurement data.
We analyze the accuracy of the DNS resolvers and determine that the use of a recursive DNS server close to the end-user typically results in server selections more similar to the optimal server selection of a CDN.
However, we did not establish a relationship between resolver accuracy and HTTP performance.
Finally, we compare the throughput of CDNs and observe that CDNs are likely optimized for different file sizes.
ED:2014-03-06
INSSI record number: 48739
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