Scalable and Efficient Content Delivery , seminar by Dr Niklas Carlsson, University of Calgary
Niklas will be visiting with SICS researchers after the talk.
Content delivery of large files, such as videos and software
distributions, consumes substantial Internet resources. One problem for
such applications is scalability: we would like system designs that can
accommodate high request rates for hot files, as well as large numbers
of files. Efficiency is also an issue, potentially from multiple
perspectives including that of overall carbon footprint. In this talk,
I will provide a high-level overview of some of my research to address
these efficiency and scalability problems, and then discuss two projects
in more detail. The first of these projects concerns how the BitTorrent
protocol, originally designed for scalable downloading of large files,
can be modified to achieve a form of peer-assisted on-demand "streaming"
delivery, in the sense that playback can begin well before the entire
media file is received. The second project concerns the problem of
achieving scalability with respect to the ``long tail'' of lukewarm/cold
files in peer-assisted systems. Time permitting, I will also discuss
current work on energy-minimal content delivery in systems with multiple
Niklas Carlsson received his M.Sc. degree in engineering physics from
Umea University, Umea, Sweden, in 2000 and his Ph.D. in computer science
from the University of Saskatchewan, Saskatoon, SK, Canada in 2006.
Since graduation he has been working as a Postdoctoral Fellow (January
2007 to June 2008) at the University of Saskatchewan, and as a Research
Associate (since July 2008) at the University of Calgary. His research
interests are in the areas of design, modeling, and performance
evaluation of distributed systems and networks. Current research topics
encompasses content delivery systems, peer-to-peer systems, sustainable
ICT, wireless sensor networks, social networks, as well as workload
characterization of systems and networks. For the past two years he has
co-chaired GreenMetrics (in conjunction with ACM SIGMETRICS).