About LSAM Request Routing
Cache Request Routing
The goal of request routing is to reduce origin server load,
bandwidth usage, and user delay,
by forwarding HTTP requests to
proxies that are likely to have cached copies of requested data.
Finding cached copies in nearby proxy servers will, in general,
achieve all of these objectives.
The approach to achieving these
advantages is to establish a system of caches and routing between
them such that aggregate request streams are formed that can
exploit commonly requested pages.
This requires (1) a system that
establishes a "mesh of caches" so that stream aggregation is possible,
and (2) a routing algorithm that balances potential advantages of
cache hits with the delays experienced
by a series of cache misses.
This routing system is being designed to both support and augment
primary LSAM mechanism for efficient distribution of related data
files via multicast channels.
We believe that the low cache hit rates seen in standard
hierarchical cache systems may be improved
by adding the LSAM multicast distribution.
Since LSAM multicast distribution will send "popular" files
to points of interest ahead of time,
this can reduce the number of requests flowing through the
cache system and consequently will reduce the "turnover" rate
in the cache.
Discussion and Details
Contact Steve Hotz
for more information about LSAM Request Routing.
is the GRA working on request routing.
Page maintainer: Steve Hotz
Last modified: Mon Jan 6 10:48:20 1997
Copyright © 1996 by USC/ISI