Towards resilient EU HPC systems: a blueprint

In high-performance computing (HPC) a single tightly-coupled job may execute for days on thousands of servers. Since a server failure typically leads to cascading effects on the whole job, requiring redundancy and/or aggressive checkpointing to prevent the whole job from failing. This has an adverse impact on the system performance and resource usage; which limits the ability to scale to larger systems. System resiliency is therefore one of the most important Exascale requirements and challenges.