SCHEDULE: NOV 12-18, 2011

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A scalable two-phase parallel I/O library with application to a large scale subsurface simulator

SESSION: Research Poster Reception

EVENT TYPE: ACM Student Research Competition Poster, Poster, Electronic Poster

TIME: 5:15PM - 7:00PM

SESSION CHAIR: Bernd Mohr

AUTHOR(S):Sarat Sreepathi, Vamsi Sripathi, Glenn Hammond, Richard Mills, Kumar Mahinthakumar

ROOM:WSCC North Galleria 2nd/3rd Floors

ABSTRACT:
This poster describes the development of a highly scalable application layer parallel I/O library (ASCEM-IO) for scientific applications. This library was envisioned to leverage our earlier I/O optimization experience to build a scalable general purpose parallel I/O capability for any application. The parallel I/O library provides a higher level API (Application Programming Interface) to read and write large scientific datasets in parallel at very large processor counts. Specifically, the goal is to take advantage of existing parallel I/O libraries, such as HDF5 which are being widely used by scientific applications and modify these algorithms to better scale on larger number of processors. This is accomplished by dividing the traditional I/O operations (read/write) into two phases, a communication phase and an I/O phase. Results with a real application on the Cray XT/5 indicates significant performance improvement on large processor cores when compared to default HDF collective I/O operations.

Chair/Author Details:

Bernd Mohr (Chair) - Juelich Supercomputing Centre

Sarat Sreepathi - North Carolina State University

Vamsi Sripathi - North Carolina State University

Glenn Hammond - Pacific Northwest National Laboratory

Richard Mills - Oak Ridge National Laboratory

Kumar Mahinthakumar - North Carolina State University

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