Report on 2002 Fault Tolerance Workshop Patricia D. Hough Computational Sciences and Mathematics Research Department Sandia National Laboratories

Motivation  Large COTS systems are prone to failures »Lots of parts; complex configurations »Applications stress the systems »Few options for application survival  University resources are untapped »DOE researchers unfamiliar with fault tolerance experts »University researchers unfamiliar with DOE problem domain Goal: Bring laboratory and university researchers together to educate each other and discuss issues associated with scalable fault tolerance.

Basic Info  June 10-11, 2002 in Albuquerque, NM  ~40 attendees »Cornell, Denison, Florida, Houston, Indiana, LANL, LLNL, MSTI, SNL, Tennessee, UT Austin  Interest exceeded capacity  Organized by Patty Hough (SNL), Tom Bressoud (Denison), and Lee Ward (SNL)  Sponsored by the CSRI

Agenda  11 invited talks + 2 hours focused discussion on: »Application descriptions and needs »System monitoring »MPI fault tolerance »Traditional approaches with a twist  Topics not covered »Checkpoint-free algorithms »Preventative measures »System services »Migration »Redistribution »Validation »Run-time environments

Conclusions  MPI support is needed »Programming model needs to be considered »Balance research with timely delivery of capabilities  New ideas are needed »Leverage hardware »More systematic, integrated approach  There are still outstanding issues »Transparency vs. intrusiveness »Can traditional approaches be made scalable?  Workshop was a great success!

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