Читать книгу CompTIA Cloud+ Study Guide - Ben Piper, David Higby Clinton - Страница 102

As I alluded to earlier, you can choose to run VMs on different virtualization hosts for redundancy in case one host fails. However, there are times when you want VMs to run on the same host, such as when the VMs need extremely low-latency network connectivity to one another. To achieve this, you would group these VMs into the same cluster and implement a cluster placement rule to ensure that the VMs always run on the same host. If this sounds familiar, it's because this is the same principle you read about in the discussion of hypervisor affinity rules.

This approach obviously isn't resilient if that host fails, so what you may also do is to create multiple clusters of redundant VMs that run on different hosts, and perhaps even in different AZs.