The innovative technologies and advanced services typical of the so called Web 2.0 have led to the development of many online social networking Web sites where users can collaborate and share information, interests, personal and professional activities. These sites integrate new technologies and services, which allow users to participate to the Web not only as consumers of the contents centrally uploaded by the providers, but also as producers of contents and consumers of contents provided by other users. Hence, the workload of these sites is the result of the complex social relationships that can be developed among users.

This project is aimed at studying and characterizing the workload of social networking sites in terms of the characteristics and behavior of the users and the communities of users sharing common interests. The objective is to derive models that describe the user behavior and the interactions between the users and the services offered within the sites. The study will rely on measurements collected by monitoring MySpace, that is one of the most popular online social networking sites. Profiles containing users details, preferences and data will be analyzed and classified by means of statistical techniques.