Open Stack

Hey,

We are also using quorum in some regions and plan to enable quorum
everwhere.

Note that we also manage to enable quorum for transient queues (using a
custom patch as it's not doable with current oslo.messaging, see my
request in [1]).
We also introduced some custom changes in py-amqp to handle correctly
the rabbit disconnections (see [2] and [3]).

So far, the real improvment is achieved thanks to the combination of all
of these changes, enabling quorum queue only was not enough for us to
notice any improvment.

The downside of quorum queues is that it consume more power on the
rabbit cluster: you need more IO, CPU, RAM and network bandwith for the
same number of queues (see [4]).
It has to be taken into account.

Cheers,
Arnaud.

[1] https://lists.openstack.org/pipermail/openstack-discuss/2023-April/033343.html
[2] https://github.com/celery/py-amqp/pull/410
[3] https://github.com/celery/py-amqp/pull/405
[4] https://plik.ovh/file/nHCny7psDCTrEm76/Pq9ASO9wUd8HRk4C/s_1686817000.png



On 13.06.23 - 09:14, Sa Pham wrote:
> Dear Khôi,
> 
> Thanks for your reply.
> 
> 
> 
> On Tue, Jun 13, 2023 at 9:05 AM Nguyễn Hữu Khôi <nguyenhuukhoinw at gmail.com>
> wrote:
> 
> > Hello.
> > Firstly, when I used the classic queue and sometimes, my rabbitmq cluster
> > was broken, the computers showed state down and I needed to restart the
> > computer service to make it up. Secondly, 1 of 3 controller is down but my
> > system still works although it is not very first as fully controller. I ran
> > it for about 3 months compared with classic. My openstack is Yoga and use
> > Kolla-Ansible as a  deployment tool,
> > Nguyen Huu Khoi
> >
> >
> > On Tue, Jun 13, 2023 at 8:43 AM Sa Pham <saphi070 at gmail.com> wrote:
> >
> >> Hi Khôi,
> >>
> >> Why do you say using the quorum queue is more stable than the classic
> >> queue ?
> >>
> >> Thanks,
> >>
> >>
> >>
> >> On Tue, Jun 13, 2023 at 7:26 AM Nguyễn Hữu Khôi <
> >> nguyenhuukhoinw at gmail.com> wrote:
> >>
> >>> Hello Huettner,
> >>> I have used the quorum queue since March and it is ok until now. It
> >>> looks more stable than the classic queue.  Some feedback to you.
> >>> Thank you.
> >>> Nguyen Huu Khoi.
> >>>
> >>>
> >>>
> >>> On Mon, May 8, 2023 at 1:14 PM Felix Hüttner <felix.huettner at mail.schwarz>
> >>> wrote:
> >>>
> >>>> Hi Nguyen,
> >>>>
> >>>>
> >>>>
> >>>> we are using quorum queues for one of our deployments. So fare we did
> >>>> not have any issue with them. They also seem to survive restarts without
> >>>> issues (however reply queues are still broken afterwards in a small amount
> >>>> of cases, but they are no quorum/mirrored queues anyway).
> >>>>
> >>>>
> >>>>
> >>>> So I would recommend them for everyone that creates a new cluster.
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>>
> >>>> Felix Huettner
> >>>>
> >>>>
> >>>>
> >>>> *From:* Nguyễn Hữu Khôi <nguyenhuukhoinw at gmail.com>
> >>>> *Sent:* Saturday, May 6, 2023 4:29 AM
> >>>> *To:* OpenStack Discuss <openstack-discuss at lists.openstack.org>
> >>>> *Subject:* [OPENSTACK][rabbitmq] using quorum queues
> >>>>
> >>>>
> >>>>
> >>>> Hello guys.
> >>>>
> >>>> IS there any guy who uses the quorum queue for openstack? Could you
> >>>> give some feedback to compare with classic queue?
> >>>>
> >>>> Thank you.
> >>>>
> >>>> Nguyen Huu Khoi
> >>>>
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> >>>>
> >>>
> >>
> >> --
> >> Sa Pham Dang
> >> Skype: great_bn
> >> Phone/Telegram: 0986.849.582
> >>
> >>
> >>
> 
> -- 
> Sa Pham Dang
> Skype: great_bn
> Phone/Telegram: 0986.849.582