Documentation for PISM, the Parallel Ice Sheet Model

December 2013

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Increasing the Scalability of PISM for High Resolution Ice Sheet Models
investigators: P. Dickens and T. Morey
journal: Proceedings of the 14th IEEE International Workshop on Parallel and Distributed Scientific and Engineering Computing, May 2013, Boston

In this paper, authors discuss their work in evaluating and increasing the I/O performance of PISM on a state-of-the-art supercomputer by using a 1 km Greenland ice sheet setup. In particular, they found that the computation performed by PISM is highly scalable, but that the I/O demands of the higher-resolution model are a significant drag on overall performance. The paper describes a series of experiments to find the cause of the relatively-poor I/O performance and how such performance could be improved. By making simple changes to the PISM source code and one of the I/O libraries used by PISM authors were able to provide an 8-fold increase in I/O performance.

applications/201312.txt ยท Last modified: 2013/12/03 09:14 by Ed Bueler
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