Difference between UMA and NUMA

Computer Engineering Computer Network MCA

UMA and NUMA are shared memory models. Multiprocessors are divided among these type of categories. In UMA, Uniform Memory Access, a single memory controller is used and it is applicable for general purpose applications and time sharing applications. In NUMA, Non-Uniform Memory Access, multi memory controllers are used. NUMA is suitable for real-time applications and time critical applications.

Following are the important differences between UMA and NUMA.

Sr. No.	Key	UMA	NUMA
1	Definition	UMA stands for Uniform Memory Access.	NUMA stands for Non Uniform Memory Access.
2	Memory Controller	UMA has single memory controller.	NUMA has multiple memory controllers.
3	Memory Access	UMA memory access is slow.	NUMA memory accsss is faster than UMA memory.
4	Bandwidth	UMA has limited bandwidth.	NUMA has more bandwidth than UMA.
5	Suitablity	UMA is used in general purpose and time sharing applications.	NUMA is used in real time and time critical applications.
6	Memory Access time	UMA has equal memory access time.	NUMA has varying memory access time.
7	Bus types	3 types of Buses supported: Single, Multiple and Crossbar.	2 types of Buses supported: Tree, hiearchical.

Mahesh Parahar

Updated on: 2019-11-26T12:20:48+05:30

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