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Selective buddy allocation for scheduling parallel jobs on clusters

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5 Author(s)
V. Subramani ; Dept. of Comput. & Inf. Sci., Ohio State Univ., Columbus, OH, USA ; R. Kettimuthu ; S. Srinivasan ; J. Johnston
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In this paper we evaluate the performance implications of using a buddy scheme for contiguous node allocation, in conjunction with a backfilling job scheduler for clusters. When a contiguous node allocation strategy is used, there is a trade-off between improved run-time of jobs (due to reduced link contention and lower communication overhead) and increased wait-time of jobs (due to external fragmentation of the processor system). Using trace-based simulation, a buddy strategy for contiguous node allocation is shown to be unattractive compared to the standard noncontiguous allocation strategy used in all production job schedulers. A simple but effective scheme for selective buddy allocation is then proposed, that is shown to perform better than non-contiguous allocation.

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Cluster Computing, 2002. Proceedings. 2002 IEEE International Conference on

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