From the course: vSphere 6.7 Foundations: Administer Resource Management Features

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DRS and resource fragmentation

DRS and resource fragmentation - vSphere Tutorial

From the course: vSphere 6.7 Foundations: Administer Resource Management Features

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DRS and resource fragmentation

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- [Rick] In this video, we'll learn about a concept called the resource fragmentation and how it impacts the performance of DRS. So let's assume that we have a situation where we have a DRS cluster. And I've got a group of smaller virtual machines running on ESXi hosts in that DRS cluster. But then over here on the right, I've got this one monster VM I'll call it. And this VM needs a ton of resources in order to work properly. So, if I have high availability configured on this cluster and ESXi04 fails, now high availability needs to pick one of these hosts to restart this virtual machine on. And at the moment, none of these hosts have enough available resources to adequately run this virtual machine. So high availability on its own can do the job but in a situation like this, high availability on its own isn't going to be smart enough to move VMs around and free up resources to run this monster VM. But if we couple…

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