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\iteman{io-port 05978097}
\itemau{Jin, Chen; Sehrish, Saba; Liao, Wei-keng; Choudhary, Alok; Schuchardt, Karen}
\itemti{Improving the average response time in collective I/O.}
\itemso{Cotronis, Yiannis (ed.) et al., Recent advances in the message passing interface. 18th European MPI users' group meeting, EuroMPI 2011, Santorini, Greece, September 18--21, 2011. Proceedings. Berlin: Springer (ISBN 978-3-642-24448-3/pbk). Lecture Notes in Computer Science 6960, 71-80 (2011).}
\itemab
Summary: In collective I/O, MPI processes exchange requests so that the rearranged requests can result in the shortest file system access time. Scheduling the exchange sequence determines the response time of participating processes. Existing implementations that simply follow the increasing order of file offsets do not necessary produce the best performance. To minimize the average response time, we propose three scheduling algorithms that consider the number of processes per file stripe and the number of accesses per process. Our experimental results demonstrate improvements of up to 50\% in the average response time using two synthetic benchmarks and a high-resolution climate application.
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\itemli{doi:10.1007/978-3-642-24449-0\_10}
\end