Optimal disk I/O with parallel block transfer
STOC '90 Proceedings of the twenty-second annual ACM symposium on Theory of computing
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SIAM Journal on Computing
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ESA '01 Proceedings of the 9th Annual European Symposium on Algorithms
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We examine the problem of scheduling concurrent independent flows on multiple-disk I/O storage systems. Two models are considered: in the shared buffer model the memory buffer is shared among all the flows, while in the partitioned buffer model each flow has a private buffer. For the parallel disk model with d 1 disks it is shown that the problem of minimizing the schedule length of n 2 concurrent flows is NP-complete for both buffer models. A randomized scheduling algorithm for the partitioned buffer model is analyzed and probabilistic bounds on the schedule length are presented. Finally a heuristic based on static buffer allocation for the shared buffer model is discussed.