Abstract
The MPI-IO interface is a critical component in I/O software stacks for high-performance computing, and many successful optimizations have been incorporated into implementations to help provide high performance I/O for a variety of access patterns. However, in spite of these optimizations, there is still a large performance gap between ”easy” access patterns and more difficult ones, particularly when applications are unable to describe I/O using collective calls.
In this paper we present LogFS, a component that implements log-based storage for applications using the MPI-IO interface. We first discuss how this approach allows us to exploit the temporal freedom present in the MPI-IO consistency semantics, allowing optimization of a variety of access patterns that are not well-served by existing approaches. We then describe how this component is integrated into the ROMIO MPI-IO implementation as a stackable layer, allowing LogFS to be used on any file system supported by ROMIO. Finally we show performance results comparing the LogFS approach to current practice using a variety of benchmarks.
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Kimpe, D., Ross, R., Vandewalle, S., Poedts, S. (2007). Transparent Log-Based Data Storage in MPI-IO Applications. In: Cappello, F., Herault, T., Dongarra, J. (eds) Recent Advances in Parallel Virtual Machine and Message Passing Interface. EuroPVM/MPI 2007. Lecture Notes in Computer Science, vol 4757. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-75416-9_34
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DOI: https://doi.org/10.1007/978-3-540-75416-9_34
Publisher Name: Springer, Berlin, Heidelberg
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