Packet Caches on Routers: The Implications of Universal Redundant Traffic Elimination
by Ashok Anand, Aditya Akella, Archit Gupta, Scott Shenker, Srinivasan Seshan
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| type: | misc | | url: | http://pages.cs.wisc.edu/~akella/papers/redundancy-sigcomm08.pdf | | abstract: | Many past systems have explored how to eliminate redundant transfers
from network links and improve network efficiency. Several of
these systems operate at the application layer, while the more recent
systems operate on individual packets. A common aspect of these
systems is that they apply to localized settings, e.g. at stub network
access links. In this paper, we explore the benefits of deploying
packet-level redundant content elimination as a universal primitive
on all Internet routers. Such a universal deployment would immediately
reduce link loads everywhere. However, we argue that far
more significant network-wide benefits can be derived by redesigning
network routing protocols to leverage the universal deployment.
We develop “redundancy-aware” intra- and inter-domain routing algorithms
and show that they enable better traffic engineering, reduce
link usage costs, and enhance ISPs’ responsiveness to traffic variations.
In particular, employing redundancy elimination approaches
across redundancy-aware routes can lower intra and inter-domain
link loads by 10-50%. We also address key challenges that may hinder
implementation of redundancy elimination on fast routers. Our
current software router implementation can run at OC48 speeds. |
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