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Energy-proportional intradomain routing and traffic engineering
The Internet's energy consumption is already significant, in part due to a
large degree of redundancy and over provisioning, as well as high idle power
consumption of network elements. Therefore, dynamically matching the network
resources to the load is highly desirable. There has been work targeted at
reducing the energy consumption of end-hosts, but very little work
involving the network backbone itself. A large body of work on intradomain
routing and traffic engineering demonstrates the difficulty in meeting the
desired network properties (low link utilization and latency), and adding
energy-awareness simply makes the problem even harder. In this work, we propose
Energy-Proportional Routing (EPR), a form of routing in which the network
strives to use the minimum amount of energy to carry the required traffic. Our evaluation on ISP
topologies shows that EPR achieves the goal of energy-proportionality and saves
up to 42% of power. Using a Click testbed we show that it is possible to: 1)
quickly and efficiently use the EPR paths at runtime for energy-saving, 2)
quickly tolerate faults. Two representative applications running over EPR-chosen
paths demonstrate EPR's marginal impact on application-level throughput and
latency.
Publications/presentations
Vasic, N. and
Kostic,
D., Energy-Aware Traffic
Engineering. Proceedings of the 1st Int'l Conf. on Energy-Efficient
Computing and Networking (e-Energy), April 2010, To appear.
Vasic, N.,
Shekhar,
S. and
Kostic,
D.,
Energy-Proportional Intradomain Routing, EPFL Technical Report
NSL-REPORT-2009-006, July 2009.
Vasic, N. and
Kostic,
D., Energy-aware
Traffic Engineering, EPFL Technical Report NSL-REPORT-2008-004,
October 2008.
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