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PRODID:-//Microsoft Corporation//Outlook MIMEDIR//EN
VERSION:1.0
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DTSTART:20101116T231500Z
DTEND:20101117T010000Z
LOCATION:Main Lobby
DESCRIPTION;ENCODING=QUOTED-PRINTABLE:ABSTRACT: Energy efficiency and parallel I/O performance are two primary constraints in today’s high performance computing systems design. However, little research has provided an in-depth understanding of energy efficiency in parallel I/O subsystems. We experimentally investigate the energy efficiency of parallel I/O systems on a DVFS (Dynamic Voltage Frequency Scaling) enabled power-aware multicore cluster. We evaluate the performance, energy, and efficiency of parallel I/O with NFS, Lustre and PVFS, and study how the efficiency is impacted by a wide range of variables including the application’s I/O access patterns, parallel file system deployments, and processor speed scaling. We found: the application’s I/O access pattern significantly affects system energy efficiency; Tailoring parallel file system design and deployment to match the application's I/O characterisitics is critical for energy efficiency; DVFS can reduce energy consumption of parallel I/O operations with little performance impact. These insights will provide guidelines for developing energy efficient HPC systems and software.
SUMMARY:Assessing Energy Efficiency of Parallel I/O Systems
PRIORITY:3
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