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Hi Razique,

First, thx for your reply.

Following to Michael's suggestion, I got some materials about it.
Let's see one BP about BareMetal here:
https://blueprints.launchpad.net/nova/+spec/baremetal-force-node

    ----"With the baremetal driver, force_hosts is not sufficient since the
compute host is actually controlling other physical nodes. We need a way to
force which baremetal node is provisioned."

The implementation of the BP, especially in the scheduler layer, answered
my doubts.
And the description of the BP also coincides with Michael's opinion. So, I
think it's the key.  :)

wingwj



On Thu, Nov 28, 2013 at 12:49 PM, Razique Mahroua <razique.mahroua at gmail.com
> wrote:

> Nothing but a taxonomic digression I'd say.
> An "host" is in a *classical* term a server that runs virtual
> machines...it could be either a server that "runs" something.
> A "node" is the OpenStack context a compute node...meaning an "host" that
> runs instances.
>
> :)
>
> - Razique
>
>
> On 27 Nov 2013, at 18:02, wu jiang wrote:
>
>  Hi All.
>>
>> Can someone give me some idea what's the difference between 'host' and
>> 'node'?
>>
>> I wonder if it is because compute host will control other physical server
>> (host or node?) in baremetal scene, so we need to distinguish?
>> But I'm not sure about it.
>>
>>
>> Regards,
>> wingwj
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