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Transparently checkpointing MPI for fault tolerance and load balancing is along-standing problem in HPC. The problem has been complicated by the need toprovide checkpoint-restart services for all combinations of an MPIimplementation over all network interconnects. This work presents MANA(MPI-Agnostic Network-Agnostic transparent checkpointing), a single code basewhich supports all MPI implementation and interconnect combinations. Theagnostic properties imply that one can checkpoint an MPI application under oneMPI implementation and perhaps over TCP, and then restart under a second MPIimplementation over InfiniBand on a cluster with a different number of CPUcores per node. This technique is based on a novel "split-process" approach,which enables two separate programs to co-exist within a single process with asingle address space. This work overcomes the limitations of the two mostwidely adopted transparent checkpointing solutions, BLCR and DMTCP/InfiniBand,which require separate modifications to each MPI implementation and/orunderlying network API. The runtime overhead is found to be insignificant bothfor checkpoint-restart within a single host, and when comparing a local MPIcomputation that was migrated to a remote cluster against an ordinary MPIcomputation running natively on that same remote cluster.

MANA for MPI: MPI-Agnostic Network-Agnostic Transparent Checkpointing