The "manual migration" option is only a default value. You can change the
migration mode to "automatic" mode if you prefer.
When you enable Host CPU Pass-Through for a VM then the migration default
value is auto set to "manual migration" in UI because it's not sure if this
VM should be automatically migrated as part of internal events (such as load
balancing policies or host turning into maintenance mode), without letting
the user controlling it.
Sometimes there are few destination hosts to migrate to and we want to let
the user controlling that since performance may decrease or migration may
But if you are sure that the cluster contains hosts with identical cpu
model and identical number of sockets, threads and cores as the source
host, and you don't mind that VM will be migrated whenever required, then
you can definitely change the migration value to "Allow manual and
On Sun, Oct 20, 2019 at 2:42 AM Strahil Nikolov <hunter86_bg(a)yahoo.com>
does anyone know why only "Manual Migration" allows passing through the
CPU from the Host to the VM ?
In many environments, the Clusters are having the same CPU model in order
to avoid any issues. Have you observed any issues with that ?
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