what is numa
NUMA (non-uniform memory access) is a method of configuring a cluster of microprocessor in a multiprocessing system so that they can share memory locally, improving performance and the ability of the system to be expanded. NUMA is used in a symmetric multiprocessing ( SMP) system. An SMP system is a tightly-coupled, share everything system in which multiple processors working under a single operating system access each other's memory over a common bus or interconnect path.