Efficiency Evaluation of Cray XT Parallel IO Stack

Conference · Mon Jan 01 00:00:00 EST 2007

OSTI ID:1261242

Yu, Weikuan ^[1]; Oral, H Sarp ^[1]; Vetter, Jeffrey S ^[1]; Barrett, Richard F ^[1]

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1. ORNL

PetaScale computing platforms need to be coupled with efficient IO subsystems that can deliver commensurate IO throughput to scientific applications. In order to gain insights into the deliverable IO efficiency on the Cray XT platform at ORNL, this paper presents an in-depth efficiency evaluation of its parallel IO software stack. Our evaluation covers the performance of a variety of parallel IO interfaces, including POSIX IO, MPI-IO, and HDF5. Moreover, we describe several tuning parameters for these interfaces and present their effectiveness in enhancing the IO efficiency.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Computational Sciences
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1261242
• Resource Relation: Conference: Cray User Group Conference, Seattle, WA, USA, 20070507, 20070510
• Country of Publication: United States
• Language: English