Open Stack

Thanks Antonio,
                          I added AggregateRamFilter in nova.conf of
scheduler and restarted nova-scheduler service and updated aggregate.

nova aggregate-set-metadata id ram_allocation_ratio=2.08
and i can see that in

nova aggregate-details 2
+----+---------------+-------------------+----------------+--------------------------------------------------------+
| Id | Name          | Availability Zone | Hosts          | Metadata
                                            |
+----+---------------+-------------------+----------------+--------------------------------------------------------+
| 2  | overcommitted | second             | 'node8' |
'availability_zone=second', 'ram_allocation_ratio=2.08' |
+----+---------------+-------------------+----------------+--------------------------------------------------------+
but still scheduler log shows
  "Filter AggregateRamFilter returned 1 host(s)"
" Filter RamFilter returned 0 hosts"
and fails with error "instances:17 does not have 2048 MB usable ram,
it only has 613.5 MB usable ram."


Any idea?


On Sat, Dec 20, 2014 at 3:09 PM, Antonio Messina
<antonio.s.messina at gmail.com> wrote:
> On Sat, Dec 20, 2014 at 8:47 AM, mad Engineer <themadengin33r at gmail.com> wrote:
>> Hello All,
>>               I would like to know if its possible to set
>> "ram_allocation_ratio" per compute node or at least per Availability
>> zone.
>> I tried setting that per compute nodes,but i get "no hosts found"
>> message when allocation ratio reaches default 1.5 .Changing it on
>> controller fixes this,but i dont want it to be set globally across all
>> AZ.Is it possible?
>
> As far as I know you can set this value only globally or per aggregate.
>
> In case you want to set it per host aggregate you have to enable
> AggregateRamFilter. I never tried, but I guess you have to set this
> value as an aggregate metadata, using
>
>     nova aggregate-set-metadata <id> ram_allocation_ratio=2
>
> If you test it and it works let us know please, I'm interested too but
> didn't have time to test it yet.
>
> .a.
>
> --
> antonio.s.messina at gmail.com
> antonio.messina at uzh.ch                     +41 (0)44 635 42 22
> S3IT: Service and Support for Science IT   http://www.s3it.uzh.ch/
> University of Zurich
> Winterthurerstrasse 190
> CH-8057 Zurich Switzerland