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 <[email protected]> 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 > > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : [email protected] > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > -- - MSc. Correa, J.L.
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