Evaluating the Viability of Process Replication Reliability for Exascale Systems
As high-end computing machines continue to grow in size, issues such as fault tolerance and reliability limit application scalability. Current techniques to ensure progress across faults, like checkpoint-restart, are increasingly problematic at these scales due to excessive overheads predicted to more than double an application's time to solution. Replicated computing techniques, particularly state machine replication, long used in distributed and mission critical systems, have been suggested as an alternative to checkpoint-restart. In this paper, the authors evaluate the viability of using state ma-chine replication as the primary fault tolerance mechanism for upcoming exascale systems.