att_abstract={{This paper proposes and evaluates a Network Aware Forward
Caching approach for determining the optimal deployment strategy
of forward caches to a network. A key advantage of this approach
is that we can reduce the network costs associated with forward
caching to maximize the benefit obtained from their deployment.
We show in our simulation that a 37% increase to net benefits could
be achieved over the standard method of full cache deployment to
cache all POPs traffic. In addition, we show that this maximal point
occurs when only 68% of the total traffic is cached.
Another contribution of this paper is the analysis we use to motivate
and evaluate this problem. We characterize the Internet traffic
of 100K subscribers of a US residential broadband provider. We
use both layer 4 and layer 7 analysis to investigate the traffic volumes
of the flows as well as study the general characteristics of
the applications used. We show that HTTP is a dominant protocol
and account for 68% of the total downstream traffic and that 34%
of that traffic is multimedia. In addition, we show that multimedia
content using HTTP exhibits a 83% annualized growth rate and
other HTTP traffic has a 53% growth rate versus the 26% over all
annual growth rate of broadband traffic. This shows that HTTP
traffic will become ever more dominant and increase the potential
caching opportunities. Furthermore, we characterize the core
backbone traffic of this broadband provider to measure the distance
traveled by content and traffic. We find that CDN traffic is much
more efficient than P2P content and that there is large skew in the
Air Miles between POP in a typical network. Our findings show
that there are many opportunities in broadband provider networks
to optimize how traffic is delivered and cached.}},
	att_authors={je925g, ag1971, mh0357, dp8327, os1872},
	att_copyright_notice={{"Copyright is held by the International World Wide Web Conference Committee (IW3C2)."}},
	att_tags={caching, internet measurement, optimization},
	author={Jeffrey Erman and Alexandre Gerber and Mohammad Hajiaghayi and Dan Pei and Oliver Spatscheck},
	institution={{in Proc. World Wide Web Conference (WWW)}},
	title={{Network-Aware Forward caching}},