- Stefan
-----Original Message-----
From: Neal Cardwell [mailto:cardwell@cs.washington.edu]
Sent: Monday, October 26, 1998 2:30 AM
To: syn@cs; websys@cs; Marc Fiuczynski; Brian K Dewey; Przemyslaw
Pardyak; Qingyue Shirley Wang
Cc: Richard Fromm
Subject: Exciting new release today about TCP
Would you rather see.......
"Pleasantville"
Gary Ross' cinematic confection about two '90s kids stuck in a '50s TV
town gets off to a rousing start but ends up mired in overreaching
political sentiment:
http://seattle.sidewalk.com/link/70581
"Soldier"
Kurt Russell's "Terminator"-esque action pic is a patchwork piece of
sci-fi schlock, strictly for fans of that whole
killing-machine-develops-feelings genre:
http://seattle.sidewalk.com/link/71981
"Happiness"
Todd Solondz's peek at the dark side of suburban life is a bleak
portrait
of a gallery of geeks -- it's "Father Knows Best" meets "Blue Velvet":
http://seattle.sidewalk.com/link/70574
*OR*, at great matinee rates.........
"Modeling the Performance of Short TCP Connections"
Recently researchers have proposed several analytic models of TCP
performance. Several of these models accurately describe the
steady-state
behavior of long TCP connections transferring megabytes of data. Several
address the performance of short TCP connections transferring a few
kilobytes of data, but assume no packet loss. However, it is not obvious
how applicable these models are, since a wealth of evidence suggests
that
in the most popular use of TCP today -- HTTP, the protocol of the
World-Wide Web -- connections are short, often around 10KB, and often
suffer high packet loss rates in the neighborhood of 5%.
This paper examines how well these existing models capture the behavior
of
short TCP connections under realistic loss rates. In addition, we
describe
two new models for TCP performance: a model for short TCP connections
that
experience no packet loss, and a generalization of this model for short
connections that do experience packet loss. Comparing these models
against
simulated TCP flows, we find that both the new models and, somewhat
surprisingly, the previously-proposed steady-state and lossless short
flow
models closely reflect TCP performance under a wide variety of simulated
conditions. However, several experiments suggest that the new short flow
models may provide a much closer fit for the measured performance of
real
TCP implementations in the Internet.
http://www.cs.washington.edu/homes/cardwell/quals/
In Sieg 422 for a limited run only: 1:00PM Monday 10/26 (today)
neal