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Proceedings of The Fifth International Symposium on Parallel and Distributed Computing (ISPDC'06)
Resource Discovery in Networks under Bandwidth Limitations
Timisoara, Romania
July 06-July 09
ISBN: 0-7695-2638-1
Kishori M. Konwar, University of Connecticut, USA
Alex A. Shvartsman, University of Connecticut, USA; Massachusetts Institute of Technology, USA
The Resource Discovery Problem [4], where cooperating machines need to find one another in a network, was introduced by Harchol-Balter, Leighton, and Lewin in the context of Akamai Technologies with the goal of building an Internet-wide content-distribution system. In the solutions for the synchronous setting proposed so far [4, 11, 12] there is a possibility that during some time step many machines may contact a single machine, and this is not a realistic assumption. This work assumes a synchronous model, however at each step a machine can send and receive only a constant number of messages. It is shown that the conjectured poly-logarithmic upper bound [4] for such a setting is not possible. This is done by proving a lower bound on time of \Omega(n), where n is the number of participating nodes. For this model a randomized algorithm is presented that solves the resource discovery problem in O(n log^2 n) time, i.e., within a poly-logarithmic factor of the corresponding lower bound. The algorithm has a O(n^2 log^2 n) message complexity and O(n^3 log^3 n) communication complexity. Simulation results for the algorithm illustrate the lower and upper bounds, and lead to interesting observations.
Citation:
Kishori M. Konwar, Alex A. Shvartsman, "Resource Discovery in Networks under Bandwidth Limitations," ispdc, pp.42-49, Proceedings of The Fifth International Symposium on Parallel and Distributed Computing (ISPDC'06), 2006
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