Abstract
In this paper, we propose to apply a novel paradigm called labeled optical burst switching with home
circuit (LOBS-HC) for intradatacenter networking to provide a
high bisection bandwidth and significantly reduce the cost and energy
consumption associated with electronic packet switching. The unique features
of LOBS-HC that make it more suitable than either optical circuit switching
(OCS) or optical packet/burst switching are exploited to enable all-to-all
communications with a guaranteed lossless transmission bandwidth between any
given pair of pods, while also supporting bursty transmissions through
wavelength-sharing among home
circuits (HCs) and statistical multiplexing. As a case study,
hypercube-like topologies are considered for the interconnection among the
pods within a datacenter. In particular, we first propose a simple but
efficient HC assignment scheme called complementary HC for 2-D cube or ring, and then extend our
works to n-cube and generalized hypercube by applying the
concept of spanning balanced
tree (SBT) for their HC assignment. Our analysis results show
that with such datacenters, the minimum number of wavelengths needed in each
case is significantly reduced from that needed with OCS and also, the
network cost in terms of wires and transceivers needed is considerably
reduced from that incurs with datacenters using electronic packet switching.
We then evaluate the traffic performance of such hypercube-based datacenters
using LOBS-HC through simulation experiments via the OPNET simulator. The
performance results obtained for a variety of communication patterns and
traffic models within a datacenter demonstrate the feasibility of the
proposed approach.
© 2011 IEEE
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