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Is there a flag in nova.conf that permits we configure that? In
documentation we can see that exists some algorithms used by scheduler.
But, I don't know how to choose that one best fit our requirements.

Thanks!
:)

On Wed, Nov 9, 2011 at 1:36 PM, Ed Leafe <ed.leafe at rackspace.com> wrote:

> On Nov 9, 2011, at 7:51 AM, Razique Mahroua wrote:
>
> > I use the default scheduler, in fact, I've never tunned it really.
> > The hypervisors all run KVM
>
>        This is where the flag is defined in nova.scheduler.least_cost.py:
>
>  32 FLAGS = flags.FLAGS
>  33 flags.DEFINE_list('least_cost_functions',
>  34         ['nova.scheduler.least_cost.compute_fill_first_cost_fn'],
>  35         'Which cost functions the LeastCostScheduler should use.')
>
>        Since the default weighting function is
> 'compute_fill_first_cost_fn', which, as its name suggests, chooses hosts so
> as to fill up one host as much as possible before selecting another, the
> pattern you're seeing is expected. If you change that flag to
> 'nova.scheduler.noop_cost_fn', you should see the hosts selected randomly.
> The idea is that you can create your own weighting functions that will
> select potential hosts in a way that best fits your needs.
>
>
> -- Ed Leafe
>
>
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-- 
- MSc. Correa, J.L.
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