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Optimizing Distributed Application Performance Using Dynamic Grid Topology-Aware Load Balancing

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2 Author(s)
Koenig, G.A. ; Dept. of Comput. Sci., Illinois Univ., Urbana, IL ; Kale, L.V.

Grid computing offers a model for solving large-scale scientific problems by uniting computational resources owned by multiple organizations to form a single cohesive resource for the duration of individual jobs. Despite the appeal of using grid computing to solve large problems, its use has been hindered by the challenges involved in developing applications that can run efficiently in grid environments. One substantial obstacle to deploying grid applications across geographically distributed resources is cross-site latency. While certain classes of applications, such as master-slave style or functional decomposition type applications, lend themselves well to running in grid environments due to inherent latency tolerance, other classes of applications, such as tightly-coupled applications in which each processor regularly communicates with its neighboring processors, represent a significant challenge to deployment on grids. In this paper, we present a dynamic load balancing technique for grid applications based on graph partitioning. This technique exploits knowledge of the topology of the grid environment to partition the computation's communication graph in such a way as to reduce the volume of cross-site communication, thus improving the performance of tightly-coupled applications that are co-allocated across distributed resources. Our technique is particularly well suited to codes from disciplines like molecular dynamics or cosmology due to the non-uniform structure of communication in these types of applications. We evaluate the effectiveness of our technique when used to optimize the execution of a tightly-coupled classical molecular dynamics code called LeanMD deployed in a grid environment.

Published in:

Parallel and Distributed Processing Symposium, 2007. IPDPS 2007. IEEE International

Date of Conference:

26-30 March 2007

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