openstack team mailing list archive

[Jonathan Proulx <jon@xxxxxxxxxxxxx>]

On Wed, Oct 31, 2012 at 1:47 PM, Huang Zhiteng <winston.d@xxxxxxxxx> wrote:
> Hi Jonathan,
>
> If I understand correctly, that bug is about multiple scheduler

There is only a single process, I was reading it as relating to
include threads within a single process, but they should clearly be
able to serialize this withing a single process, so hoping my reading
is not correct.

>What openstack package are you using?

2012.2-0ubuntu5~cloud0  on Ubuntu 12.04 from Ubuntu cloud-archive.

With further testing it appears the allocation ratios are simply being
ignored as the ChanceScheduler also violates my resource allocation
limits I just hadn't been testing at large enough scale to reliably
see it.

I am seeing memory allocations >1.5 default ram_allocation_ratio which
is somewhat curious.  So it's almost as if the RamFilter isn't
filtering rather than falling back to the default allocation ration
(the compute nodes would melt before I got to the 16:1 default cpu
allocation ration so not surprised I'm not getting near that more like
2:1)

again despite:
scheduler_available_filters=nova.scheduler.filters.standard_filters
scheduler_default_filters=AvailabilityZoneFilter,RamFilter,CoreFilter,ComputeFilter,RetryFilter
cpu_allocation_ratio=1.0
ram_allocation_ratio=1.0

Thanks,
-Jon