sponsored byIEEEACMThe International Conference for High Performance 
Computing, Networking, Storage and Analysis
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SCHEDULE: NOV 16-21, 2014

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Fail-in-Place Network Design: Interaction between Topology, Routing Algorithm and Failures

SESSION: Hardware Vulnerability and Recovery


TIME: 2:00PM - 2:30PM

SESSION CHAIR: Alison Kennedy

AUTHOR(S):Jens Domke, Torsten Hoefler, Satoshi Matsuoka



The growing system size of high performance computers results in a steady
decrease of the mean time between failures. Exchanging network components
often requires whole system downtime which increases the cost of failures.
In this work, we study a fail-in-place strategy where broken network elements
remain untouched. We show, that a fail-in-place strategy is feasible for today’s
networks and the degradation is manageable, and provide guidelines for the
design. Our network failure simulation toolchain allows system designers to
extrapolate the performance degradation based on expected failure rates, and
it can be used to evaluate the current state of a system. In a case study of
real-world HPC systems, we will analyze the performance degradation
throughout the system’s lifetime under the assumption that faulty network
components are not repaired, which results in a recommendation to change
the used routing algorithm to improve the network performance as well as the
fail-in-place characteristic.

Chair/Author Details:

Alison Kennedy (Chair) - Edinburgh Parallel Computing Centre

Jens Domke - Tokyo Institute of Technology

Torsten Hoefler - ETH Zurich

Satoshi Matsuoka - Tokyo Institute of Technology

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Paper provided by the ACM Digital Library

Paper also available from IEEE Computer Society