fuel-dev team mailing list archive

[Dmitry Ukov <dukov@xxxxxxxxxxxx>]

Core and Disk  filters should be enabled (they are disabled by default) in
order to avoid compute node oveloading
- cpu_allocation_ratio=1.0 - was customer requirement. I think 16.0 is way
to big over commit ratio (potentially 16 vms on 1 core). I would say 2.0 or
3.0 will be reasonable here.
- disk_allocation_ratio=1.0 - it is unsafe to over commit disk
- ram_allocation_ratio=1.0 - this was customer requirement. Actually we can
use default value here. (AFAIR default is 1.5 )
- ram_weight_multiplier=0.0 and scheduler_host_subset_size=30 will help us
to get random VMs distribution if compute nodes significantly differ from
each other in terms of total RAM amount



On Thu, Mar 20, 2014 at 2:58 PM, Bogdan Dobrelya <bdobrelia@xxxxxxxxxxxx>wrote:

> On 03/20/2014 08:47 AM, Mike Scherbakov wrote:
> > Hi Dmitry,
> > I was running through bp created by
> > you:
> https://blueprints.launchpad.net/fuel/+spec/scheduler-config-improvements.
> >
>
> Interesting, why CPU overcommitment defaults (
>
> https://github.com/openstack/nova/blob/master/etc/nova/nova.conf.sample#L1759
> ) are so 'bad' to being changed so drastically 16->1?
>
> > I'm wondering whether this config will work fine for every installation
> > we do with Fuel.. what are the possible limitations / corner cases?
> >
> > Thanks,
> > --
> > Mike Scherbakov
> > #mihgen
> >
> >
>
>
> --
> Best regards,
> Bogdan Dobrelya,
> Skype #bogdando_at_yahoo.com
> Irc #bogdando
>



-- 
Kind regards
Dmitry Ukov
IT Engineer
Mirantis, Inc.