@irtaza9 - you can set an affinity for a host, so that when a VM is created your VM will always try and be housed on a particular host.

@irtaza9 said in Hosts vs. Pools - Information Required:

xcp-ng is a distribution which runs on a bare-metal and allow us to perform virtualization. I want to know more about hosts, pools. What is the difference between these two concepts. Also what is cluster and What about HA? Where does the HA happen? b/w pools or b/w hosts?

By default, when you start up XO and add your first host, that host will join a pool ( albeit the same name as the HOST you just added). You can then add more hosts to the pool to provide more redundancy or compute power.

I run a setup where different departments run different pools. I suggest taking a boo at this article as it outlines HA very clearly. One downside of HA is when you need to do an upgrade to your pool, it can be a bit of pain.

https://xcp-ng.org/blog/2024/08/22/xcp-ng-high-availability-a-guide/