Our case study applying the palladio approach to 1&1's e-mail system has been accepted for publication at the 10th Working IEEE/IFIP Conference on Software Architecture 2012.
The e-mail system operated by the 1&1 Internet AG, which is one of Europe's largest e-mail providers, is the basis of several national and international e-mail platforms like GMX, web.de, mail.com and india.com. The system comprises more than 2,000 servers and provides services for more than 40 million users in Germany alone. In a project with the 1&1 mail department in Karlsruhe, we applied the Palladio approach to 1&1’s mail system with the aim to evaluate the applicability of the Palladio approach to such very large and distributed systems. The results show that Palladio is able to predict the resource utilization on the different servers with high accuracy. Compared to the setup of an equivalent test system to analyse different load situations, the modelling effort is negligible. Additionally, the results of the project helped to identify potential performance improvements that are planned to be integrated within a next update cycle. The high accuracy of the predictions allows integrating the results into a workload-aware runtime performance monitoring approach as described in our paper  presented at the 10th Working IEEE/IFIP Conference on Software Architecture 2012 (WICSA’12).
|||Christoph Rathfelder, Stefan Becker, Klaus Krogmann, and Ralf Reussner. Workload-aware system monitoring using performance predictions applied to a large-scale e-mail system. In Proceedings of the Joint 10th Working IEEE/IFIP Conference on Software Architecture (WICSA) & 6th European Conference on Software Architecture (ECSA), Helsinki, Finland, 2012. (to appear). [ bib | http ]|