Saturday, March 15

9:00 AM-10:00 AM
Chair: Charles H. Koelbel, Rice University
Greenway C-H

High-Performance I/O Patterns and Policies

There is growing realization that input/output is a major impediment to high performance for an important class of grand and national challenge scientific applications. Using the Pablo environment as basis, we sketch current efforts to understand the spatial and temporal patterns of input/output present in current applications and system responses to these patterns. The results of these studies show that there are wide variations in access patterns across applications and that performance is critically sensitive to the match of application access pattern and file system policy. Building on these results, we describe the implications for parallel file systems and techniques for adaptively managing parallel input/output systems.

Daniel A. Reed
University of Illinois, Urbana-Champaign

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MMD, 1/24/97