frankdenneman.nl Blog

Impact of CPU Hot Add on NUMA scheduling

On a regular basis, I receive the question if CPU Hot-add impacts CPU performance of the VM. It depends on the vCPU configuration of the VM. CPU Hot-Add is not compatible with vNUMA, if hot-add is enabled the virtual NUMA topology is not exposed to the guest OS and this...

Performance Study: DRS Cluster Management with Reservation and Shares

Last Friday a new performance study was published about DRS Cluster Management. This paper covers the behavior of reservation and shares within a DRS cluster in-depth. It's a great read! And being honest, it's always awesome to see a reference to the vSphere Clustering Deep Dive in official documentation. Download...

vSphere 6.5 Host Deep Dive Update

Maybe you have noticed that no new content has appeared on the site for a while. And the upcoming book “vSphere 6.5 Host Resources Deep Dive” is to blame for this situation. Last year, Niels Hagoort and I started working on the companion book of the highly successful vSphere Clustering...

VMware Cloud on AWS at re:Invent

Thank you for all the great feedback since we announced our partnership with Amazon Web Services (AWS) on October 13! We have seen a lot of interest for VMware Cloud on AWS (VMC) from customers, partners, industry analysts, and social media. Following on from the announcement in San Francisco, we...