Comparing, Contrasting, Generalizing, and Integrating Two Current Designs for Fault-Tolerant MPI
Amin Hassani, Anthony Skjellum, Ron Brightwell, Purushotham Bangalore · 2014
We compare and contrast the approaches and key features of two proposals for fault-tolerant MPI: User-Level Failure Mitigation (UFLM) and Fault-Aware MPI (FA-MPI). We show how they are complementary and also how they could leverage each other through modifications and/or extensions. We show how to "weaken" and extend ULFM to help integrate it with FA-MPI, with corollary benefits of broadening applicability of ULFM. Reducibility of each to the other is considered. This helps identify which components of each are minimally "required" for standardization, versus layerable on a future MPI specification.