Open Stack

> -----Original Message-----
> From: Jay Pipes [mailto:jaypipes at gmail.com]
> Sent: Monday, May 05, 2014 9:50 AM
> To: openstack-dev at lists.openstack.org
> Subject: Re: [openstack-dev] [nova] Question about addit log in
> nova-compute.log
> 
> On 05/04/2014 11:09 PM, Chen CH Ji wrote:
> > Hi
> >                 I saw in my compute.log has following logs which looks
> > to me strange at first, Free resource is negative make me confused and I
> > take a look at the existing code
> >                 looks to me the logic is correct and calculation doesn't
> > have problem ,but the output 'Free' is confusing
> >
> >                 Is this on purpose or might need to be enhanced?
> >
> > 2014-05-05 10:51:33.732 4992 AUDIT nova.compute.resource_tracker
> [-]
> > Free ram (MB): -1559
> > 2014-05-05 10:51:33.732 4992 AUDIT nova.compute.resource_tracker
> [-]
> > Free disk (GB): 29
> > 2014-05-05 10:51:33.732 4992 AUDIT nova.compute.resource_tracker
> [-]
> > Free VCPUS: -3
> 
> Hi Kevin,
> 
> I think changing "free" to "available" might make things a little more
> clear. In the above case, it may be that your compute worker has both
> CPU and RAM overcommit enabled.
> 
> Best,
> -jay

HI, Jay,
	I don't think change 'free' to 'available' will make it clearer. 
	IMHO, the calculation of the 'free' is bogus. When report the status in the periodic task, the resource tracker has no idea of the over-commit ration at all, thus it simply subtract the total RAM number assigned to instances from the RAM number provided by hypervisor w/o considering the over-commitment at all. So this number really have meaningless.

--jyh

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