What is vNUMA in VMware?

What is vNUMA in VMware?

vNUMA (virtual non-uniform memory access) is a memory-access optimization method for VMware virtual machines (VMs) that helps prevent memory-bandwidth bottlenecks. Virtual NUMA is especially useful with large, high-performance virtual machines or multiple VMs in a vApp.

What is NUMA and vNUMA?

When a virtual machine is sized larger than a single physical NUMA node, a vNUMA topology is created and presented to the guest operating system. This virtual construct allows a workload within the virtual machine to benefit from physical NUMA, while continuing to support functions like vMotion.

How do I set up NUMA?

4.7. Configuring Virtual NUMA

  1. Click the Host tab.
  2. Select the Specific Host(s) radio button and select the host(s) from the list.
  3. Enter a number into the NUMA Node Count field to assign virtual NUMA nodes to the virtual machine.
  4. Select Strict, Preferred, or Interleave from the Tune Mode drop-down list.

Does Corespersocket affect performance?

To summarize, this test demonstrates that changing the corespersocket configuration of a virtual machine does indeed have an impact on performance in the case when the manually configured virtual NUMA topology does not optimally match the physical NUMA topology.

What are cores per socket?

When you choose cores per socket, the system divides the number of CPUs by the number of cores to back into the number of physical sockets. So in your case, the maximum number of logical processors you can assign to any VM is no more than the total on the system (12).

How many NUMA nodes does a CPU have?

The resulting benefit is that each AMD CPU can use two NUMA nodes. In this best practice, the NUMA Nodes per Socket was set to 2.

How do I enable NUMA in BIOS?

From the System Utilities screen, select System Configuration > BIOS/Platform Configuration (RBSU) > Performance Options > Advanced Performance Tuning Options > NUMA Group Size Optimization and press Enter. Clustered—Optimizes groups along NUMA boundaries, providing better performance.

How do I enable NUMA in VMware?

To edit with vSphere Client: Right-click on VM. Select Edit Settings. Click the Options tab….Configure virtual machines to use hyper-threading with NUMA in VMware ESXi (2003582)

  1. Highlight Host.
  2. Click the Configuration tab.
  3. Under Software, click Advanced Settings.
  4. Highlight Numa and browse to Numa. PreferHT.

What is difference between core and socket?

A socket is the physical socket where the physical CPU capsules are placed. A normal PC only have one socket. Cores are the number of CPU-cores per CPU capsule. A modern standard CPU for a standard PC usually have two or four cores.

Does quad core mean 4 processors?

A quad-core processor is a chip with four independent units called cores that read and execute central processing unit (CPU) instructions such as add, move data, and branch.

Is vCPU the same as cores?

A VCPU is a core. Your CPU, if Hyperthreaded, doubles your amount of physical cores. Example: You a Quad Core Xeon Processor Socket. It has 4 cores, but it is presented as 8 cores because of hyperthreading.