Hi Luca, we have couple of features (present and coming) that might be related to what you need: 1) Preferred hosts and host pinning This is controlled by the Start Running On list. A VM will start on one of those hosts of possible, but it will still start somewhere else if the selected hosts are not capable of running the VM (down, not enough memory, ...) You can combine this with disabled migrations (the same dialog) to get what we call VM pinning. VMs configured like that will only start on one of the listed hosts and will never migrate. 2) Affinity labels There is a new feature we introduced in oVirt 4.0 that allows you to specify a "sub-cluster". It is a stronger version of the Preferred hosts setting, because it makes sure a labelled VM is only started or migrated to hosts with the same label. You can read more about it in my blog post: https://www.ovirt.org/blog/2016/07/affinity-labels/ 3) VM to Host affinity We are working on an enhancement to the current VM to VM affinity groups for oVirt 4.1. This update will add host support to the affinity groups and allow you the same flexibility you currently have with VM to VM affinity groups (soft/strong positive/negative relationship). Best regards -- Martin Sivak SLA / oVirt On Thu, Dec 15, 2016 at 2:27 PM, Luca 'remix_tj' Lorenzetto <lorenzetto.luca(a)gmail.com&gt; wrote: