Accession Number:

ADA495174

Title:

Parallel Programming Enhancements for Processing Hydrographic Data

Descriptive Note:

Conference paper

Corporate Author:

NAVAL RESEARCH LAB STENNIS SPACE CENTER MS

Report Date:

2003-07-01

Pagination or Media Count:

7.0

Abstract:

The research in this paper focuses on the IO problem associated with a parallel application writing to a single physical disk. Included in our research are the original ideas that led to the first version of the parallel software, subsequent versions of the software derived from lessons learned from benchmark results, and speedup results of each version. The underlying purpose of this software is to process hydrographic data having a complicated, multi-tiered format. The data processing involves reading tens to hundreds of files containing raw data, filtering out extraneous data values, and writing the filtered data to a single file used in additional processing. The problem is not computationally intensive, but bound by the systems file writing capability. Results show that the more responsible the software was for organizing the data before writing, the better the speedup. The critical factor for writing data efficiently involved the limitation of writing data over a single IO controller. Our parallel software has fantastic utility where system specifications do not allow for the use of parallel file systems, or writing data over multiple IO controllers.

Subject Categories:

  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE