fuel-dev team mailing list archive

[Bogdan Dobrelya <bdobrelia@xxxxxxxxxxxx>]

On 03/21/2014 03:04 PM, Dmitry Ukov wrote:
> 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

Thank you, that makes sense. I vote for enable these ones (leaving the
ram_allocation_ratio defaults) for Fuel nova manifests for Puppet. That
do you think?

> 
> 
> 
> On Thu, Mar 20, 2014 at 2:58 PM, Bogdan Dobrelya <bdobrelia@xxxxxxxxxxxx
> <mailto: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 <http://bogdando_at_yahoo.com>
>     Irc #bogdando
> 
> 
> 
> 
> -- 
> Kind regards
> Dmitry Ukov
> IT Engineer
> Mirantis, Inc.
> 


-- 
Best regards,
Bogdan Dobrelya,
Skype #bogdando_at_yahoo.com
Irc #bogdando