Dynamic Communicators in MPI

Conference · Thu Jan 01 00:00:00 EST 2009

OSTI ID:1003761

Graham, Richard L ^[1]; Keller, Rainer ^[2]

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1. ORNL
2. Universitat Stuttgart

This paper describes a proposal to add support for dynamic communicators to the MPI standard. This adds the ability to grow or shrink a specified communicator, under well specified circumstances. The goal is to make it possible for a new class of applications long running, mission-critical, loosely coupled applications, running in a highly dynamic environment - to use MPI libraries for their communications needs, and to enable HPC applications to adjust to changing system resources. Implementation analysis indicates that performance impact on existing high-performance MPI applications should be minimal, or non-existent. The changes to MPI implementations are expected to be well compartmentalized.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1003761
• Resource Relation: Conference: EuroPVM/MPI 2009, Espoo, Finland, 20090907, 20090910
• Country of Publication: United States
• Language: English