[pve-devel] Optimizing CPU flags

[Stefan Priebe - Profihost AG]

Am 11.02.2015 um 06:28 schrieb Dietmar Maurer:
> On 01/30/2015 10:23 PM, Stefan Priebe wrote:
>> "For mixed clusters, use the lowest available CPU version, so if one
>> host is Penryn and the other Nehalem, use Penryn on both. If you are
>> using RHEV or oVirt, this is already built in. VMWare have this called
>>> "EVC" and position it as a huge feature."

> What exactly is a fixed cluster? The admin can always add an additional
> node, and it is not possible to
> know the CPU features of new nodes in advance.

Sure live migration may fail - but this is also true for using the host
option.

The optimize option has the advantage that the maximum features will be
used for new VMs - this might also need the enforce parameter.

Stefan