Isolating jobs for security on high-performance fabrics

The various pieces of equipment in supercomputers are shared between jobs, that belong to different users. This situation raises security concerns. Jobs must not be able to conduct denial of service attacks targeting other jobs (voluntarily or accidentally). Moreover, job isolation must be guaranteed: unauthorized communication between two different jobs should not be allowed. However, high-performance interconnects are designed with performance as their main objective, and bypass the OS and its security models. In this paper, we show that by acting at the routing table level, it is possible to enforce job isolation without impacting job performance. Moreover, the isolation process can be dynamic, quick to set-up, with algorithms that are both independent from the routing algorithms and the interconnect topology.