SCHEDULE: NOV 15-20, 2015

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Parallel I/O in Practice

SESSION: Parallel I/O in Practice

EVENT TYPE: Tutorials

EVENT TAG(S): Architectures, Applications

TIME: 8:30AM - 5:00PM

Presenter(s):Robert Latham, Robert Ross, Brent Welch, Katie Antypas

ROOM:12A

ABSTRACT:

I/O on HPC systems is a black art. This tutorial sheds light on the
state-of-the-art in parallel I/O and provides the knowledge necessary for
attendees to best leverage I/O resources available to them. We cover the
entire I/O software stack including storage and parallel file systems at the
lowest layer, the role of burst buffers (nvram), intermediate layers (such as
MPI-IO), and high-level I/O libraries (such as HDF-5). We emphasize ways to
use these interfaces that result in high performance and tools for generating
insight into these stacks. Benchmarks on real systems are used throughout to
show real-world results.

In the first half of the tutorial we cover the fundamentals of parallel I/O.
We discuss storage technologies, both present and near-future. Our parallel
file systems material covers general concepts and examines three examples:
GPFS, Lustre, and PanFS. Our second half takes a more application-oriented
focus. We examine the upper library layers of the I/O stack, covering MPI-IO,
Parallel netCDF, and HDF5. We discuss interface features, show code examples,
and describe how application calls translate into PFS operations. Finally we
discuss tools for capturing and understanding I/O behavior.

Chair/Presenter Details:

Robert Latham - Argonne National Laboratory

Robert Ross - Argonne National Laboratory

Brent Welch - Google

Katie Antypas - Lawrence Berkeley National Laboratory

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