Lecture
Delay Tolerant Bulk Data Transfers on the Internet
or how to book some terabytes on "red-eye" bandwidth
Speaker: |
Nikolaos Laoutaris, Telefonica Research |
Date: |
Friday, 24 October 2008 |
Time: |
12:00-13:30 |
Location: |
"Mediterranean Studies" Seminar Room, FORTH. Heraklion, Crete |
Host: |
Maria Papadopouli |
| Abstract: |
Many emerging scientific
and industrial applications require the capability to transfer
large quantities of data, ranging from tens of terabytes to petabytes.
Examples include the transport of high definition movies between
studios and theaters, and the transport of large quantities of
data from telescopes and particle accelerators/colliders to laboratories
all around the world. A convenient property of many of these applications
is their ability to tolerate delivery delays from a few hours
to a few days. Such Delay-Tolerant Bulk (DTB) transfers are currently
being serviced through the use of the postal system to transport
hard drives and DVDs, or though the use of expensive dedicated
networks. In this work we have used traffic data from 200+ links of a large transit ISP to show that the naive approach of using end-to-end (E2E) connection oriented transfers can be prohibitively expensive under widely used 95-percentile charging schemes. We have also conducted extensive live measurements across multiple ISPs to show that the available bandwidth of E2E connections is subject to time-of-day effects. Based on these observations, we proceed to design a system for performing Store-and-Forward transfer of DTB data. We evaluate the performance of our system under two scenarios: (1) 95-percentile charging, (2) flat-rate charging under time-of-day capacity constraints. |
| Bio: |
Nikolaos Laoutaris is a research
scientist at Telefonica Research, Barcelona. Prior to that he
was a postdoc fellow at Harvard University and a Marie Curie postdoc
fellow at Boston University. He holds a Ph.D. degree in Computer
Science from the University of Athens, Greece (2004). His main
research interests go into algorithmic and the performance evaluation
issues of content distribution networks, overlay routing systems,
peer-to-peer networks, and multimedia streaming systems. More
information can be found at: http://research.tid.es/nikos/ * This talk is based on joint work with: Hitesh Ballani (Cornell), Pablo Rodriguez (Telefonica Research), Georgios Smaragdakis (BU), and Ravi Sundaram (Northeastern). |
