Full Introduction to NUMA (Non-Uniform Memory Access)

What Is NUMA?

It is the abbreviation of Non-Uniform Memory Access.

NUMA is used in symmetric multiprocessing (SMP) systems.

NUMA can be thought of as a cluster in a box.

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Such systems usually contain 16 to 256 microprocessors.

For applications running in an SMP system, all single processor memories look like one memory.

NUMA treats each cluster as a node in an interconnected web link.

NUMA maintains a hierarchical view of the data on all nodes.

SCI coordinates so-called cache coherence or coherence among the nodes of multiple clusters.

SMP and NUMA systems are commonly used in applications such as data mining and decision support systems.

In these applications, the processing can be split into multiple processors that work together on a common database.

Sequent, Data General and NCR belong to companies that produce NUMA SMP systems.