|
Contact
Douglas Freimuth
Server and Enterprise Networking Group
IBM T. J. Watson Research Center
30 Saw Mill River Road
Hawthorne, NY 10532
dmfreim@us.ibm.com
|
Project
Description
The Web and Internet
together constitute a critical information, entertainment, and
commerce infrastructure that is rapidly evolving from a best-effort
service model to one in which service differentiation can be provided
for users, services, and applications. This service differentiation
(also referred to as Quality of Service (QoS)) is in the form of
preferential treatment (using priorities, resource reservation, etc.)
of one type of user/application traffic over another at the servers,
proxies, and network elements that comprise the end-to-end
infrastructure. Many ISPs, network carriers, and Web sites are
enabling some form of service differentiation and this emphasis is
likely to become even stronger as the Internet continues its
exponential growth.We are pursuing a number of research directions
investigating support for service differentiation on Internet servers
and proxies. These include
flexible and efficient network
bandwidth management for Internet servers, proxies, and server farms,
dynamic inbound connection rate control for server overload
protection system support to enable resource management (CPU,
network bandwidth) for co-located Web sites and Internet applications
on the same server platform, policy-enabled management for server
farms.These research efforts would enable construction of the
next-generation Internet/Web servers and large-scale Web hosting sites
that can service client requests selectively while ensuring
performance isolation and continued operation even during severe
traffic surges.
Conference Presentations
"Kernel Mechanisms for Service Differentiation in Overloaded Web Servers," T. Voigt, R. Tewari, D. Freimuth, A. Mehra, in USENIX Annual Technical Conference, June 2001. Available as IBM Research Report RC21925.
"Policy-based Differentiated Services on AIX," A. Mehra, D. Verma, R. Tewari, T. Barzilai, D. Freimuth, M. Beigi, IETF Draft. July 14, 2000.
"Design and Implementation of an RSVP based quality of service architecture for an integrated services internet," T. Barzilai, D. Kandlur, A. Mehra, and D. Saha, IEEE Journal on Selected Areas in Communications, vol. 16, no. 3, pp. 397-413, April 1998.
"Design considerations for rate control of aggregated tcp connections," A. Mehra, R. Tewari, and D. Kandlur, Proceedings of NOSSDAV, New Jersey, June 1999.
"Virtual services: A new abstraction for server consolidation," J. Reumann, A. Mehra, K. Shin, D. Kandlur, Proceedings of USENIX Annual Technical Conference, June 2000.
"Exploring the Performance Impact of QoS Support in TCP/IP Protocol Stacks," R. Engel, D. Kandlur, A. Mehra, and D. Saha, Proceedings of IEEE INFOCOM98, March 1998.
Project Members
