I just realized that when I change compatibility level to 4.3 under edit cluster settings it is automatically switching CPU type from "Intel SandyBridge IBRS Family" to "Intel Nahalem Family".  I believe the CPU type change is what is requiring all hosts to be in maintenance mode.  My question is, is the change of the family type correct or is it a different family type being selected due to a bug or some other issue?

On Wed, Feb 13, 2019 at 9:54 AM Jayme <jaymef@gmail.com> wrote:

I'm also a bit unclear about updating to 4.3 cluster level.  I have a 3 host HCI setup which I just updated to 4.3 manually.  I upgraded engine to 4.3 then upgraded each of the three hosts to ovirt node 4.3.  I still need to change cluster/data centre compatibility level to 4.3.  If I try to change cluster compatibility level to 4.3 it tells me that all hosts need to be in maintenance to do so (does this mean I need to shut down all VMs and put each host in maintenance?) 

On Wed, Feb 13, 2019 at 7:24 AM Roman Last <admin@synergy.ru> wrote:

Hello!
What sequence of upgrading cluster to 4.3 version?
When i click upgrade on host w or w\o host reboot it just says "Upgrade has started for" and nothing after timeout reached. When i force restart host, version 4.3 not added. Is that normal?
https://prnt.sc/mki3v8
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