Mass Group Laboratories
|To pursue the research agenda of the Mass group we are in
the process of setting up two laboratories: (1) The Lab In the Internet (LII Lab), and (2) the Internet In the Lab (IIL Lab).
The IIL lab will be used for performance evaluation studies involving controlled measurements of the protocols and techniques developed as part of Mass Group projects. To be able to create realistic testing scenarios, we will need to generate large numbers of flows (e.g., thousands of flows) targeted at our experimental BackBay-enabled Web server. The flows must be representative of the characteristics of Web transfers; for that purpose we intend to use our Surge HTTP workload generation tool. To enable the study of the interactions between servers using our protocols and those not using them, we will set up an environment of multiple servers sharing a congestion path. Also, to introduce cross-traffic that displays self-similar characteristics (representative of what have been observed in a number of network measurement studies, including our own, it will be necessary to have a large number of heavy-tailed on/off sources and sinks passing over the shared congestion path under consideration. The main component of the IIL is the MASS server rack.
The LII lab will be used for performance evaluation studies involving WAN measurements. In particular, one important method of evaluating the efficacy of Mass projects techniques is to test how they behave in a WAN setting. To that end, the LII lab will enable us to run experiments from remote sites to servers hosted in our laboratories. By instrumenting some of the local servers with Beacon and Turnpike functionality, while leaving others unmodified, we will establish the improvements that our techniques yield when servicing clients under real WAN conditions. Other uses of our LII lab will include the collection of synchronized measurements from multiple Internet vantage points to allow us to characterize the short time-scale phenomena (and the efficacy of our proposed solutions).