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BASIC FAULT-TOLERANCE ISSUES

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The FT-MPI specification gives answers to the following questions re- lated to the recovery process:

1. What are the required steps and/or options to start the recovery proce- dure once the processes are in the ’FAILURE RECOGNIZED’ status?

  • 2.

    What is the status of MPI objects and processes after recovery?

  • 3.

    What is the status of ongoing communication (point-to-point com- munication as well as collective operations) after recovering from a failure?

The first question is handled by the recovery mode (FTMPI RECOVERY- MODE), the second by the communicator mode(FTMPI COMM MODE) and the third by the message mode(FTMPI MSG MODE) respectiveley the collective communication mode (FTMPI COLL MODE).

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