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Solving vNUMA Topology Mismatch When Migrating between Dual Socket Servers and Quad Socket Servers

March 11, 2022
I recently received a few questions from customers migrating between clusters with different CPU socket footprints. The challenge is not necessarily migrating ... Read More...
1309 views7 min read

vSphere 7 Cores per Socket and Virtual NUMA

December 2, 2021
Regularly I meet with customers to discuss NUMA technology, and one of the topics that are always on the list is the Cores per Socket setting and its potential... Read More...
7470 views8 min read

VM Service – Help Developers by Aligning Their Kubernetes Nodes to the Physical Infrastructure

May 3, 2021
The vSphere 7.0 U2a update released on April 27th introduces the new VM service and VM operator. Hidden away in what seems to be a trivial update is a collecti... Read More...
3173 views11 min read

Machine Learning Workload and GPGPU NUMA Node Locality

January 30, 2020
In the previous article "PCIe Device NUMA Node Locality" I covered the physical connection between the processor and the PCIe device briefly touched upon machi... Read More...
1554 views18 min read

PCIe Device NUMA Node Locality

January 10, 2020
During this Christmas break, I wanted to learn PowerCLI properly. As I'm researching the use-cases of new hardware types and workloads in the data center, I ma... Read More...
6783 views15 min read

AMD EPYC Naples vs Rome and vSphere CPU Scheduler Updates

October 14, 2019
Recently AMD announced the 2nd generation of the AMD EPYC CPU architecture, the EPYC 7002 series. Most refer to the new CPU architecture using its interna... Read More...
7998 views14 min read

60 Minutes of NUMA VMworld Session Commands

August 27, 2019
Verify Distribution of Memory Modules with PowerCLI Get-CimInstance -CimSession $Session CIM_PhysicalMemory | select BankLabel, Description, @{n=‘Capacity i... Read More...
1993 views1 min read

AMD EPYC and vSphere vNUMA

February 19, 2019
AMD is gaining popularity in the server market with the EPYC CPU platform. The EPYC CPU platform provides a high core count and a large memory capacity. If you... Read More...
7293 views21 min read
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What if the VM Memory Config Exceeds the Memory Capacity of the Physical NUMA Node?

October 5, 2017
This week I had the pleasure to talk to a customer about NUMA use-cases and a very interesting config came up. They have a VM with a particular memory configura... Read More...
3721 views3 min read
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A vSphere Focused Guide to the Intel Xeon Scalable Family – Memory Subsystem

October 3, 2017
The Intel Xeon Scalable Family introduces a new platform (Purley). The most prominent change regarding system design is the memory subsystem. More Memory Bandwi... Read More...
2708 views8 min read
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About the Author

Frank Denneman is a Chief Technologist in the Office of CTO of the Cloud Infrastructure Business Group at VMware. Frank focuses on Machine Learning Infrastructure and on compute resource management such as DRS and NUMA. He is the author of multiple books, including “vSphere 6.5 Host Technical Deep Dive” and the “vSphere Clustering Technical Deep Dive” series. He is the host of two podcasts: “Unexplored Territory” (English) and “In the aap gelogeerd” (Dutch).

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