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Published in:
2011 | OriginalPaper | Chapter
A Log-Scaling Fault Tolerant Agreement Algorithm for a Fault Tolerant MPI
Authors : Joshua Hursey, Thomas Naughton, Geoffroy Vallee, Richard L. Graham
Published in: Recent Advances in the Message Passing Interface
Publisher: Springer Berlin Heidelberg
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The lack of fault tolerance is becoming a limiting factor for application scalability in HPC systems. The MPI does not provide standardized fault tolerance interfaces and semantics. The MPI Forum’s Fault Tolerance Working Group is proposing a collective fault tolerant agreement algorithm for the next MPI standard. Such algorithms play a central role in many fault tolerant applications. This paper combines a log-scaling two-phase commit agreement algorithm with a reduction operation to provide the necessary functionality for the new collective without any additional messages. Error handling mechanisms are described that preserve the fault tolerance properties while maintaining overall scalability.