openstack team mailing list archive

[Hao Wang <hao.1.wang@xxxxxxxxx>]

Thanks guys for your insightful replies. I'm studying them. If I've got
anything, I'll get back to you as soon as possible.

Have a nice day!

Cheers,
Howard

On Wed, Oct 10, 2012 at 7:25 PM, Sandy Walsh <sandy.walsh@xxxxxxxxxxxxx>wrote:

> Hey Howard,
>
> Queues are generally in memory, but you may turn on persistent (disk)
> queues in your environment. So that's your limitation. Having rabbitmq on a
> different server is a good idea.
>
> Also, Queues are only used for control, not user data, so they shouldn't
> be that big of a burden. Having a queue-based architecture adds some
> complexity for synchronization, but their benefit of giving us
> burst-handling capabilities far outweigh that (imho).
>
> If your queues are filling up, you may:
> 1. need beefier machines processing the offending queues (or rabbit server)
> 2. need to add more worker nodes (more network, more scheduler, though
> more compute isn't appropriate)
> 3. think about clustering rabbit
>
> Notifications are perhaps the chattiest queues in the system, so make sure
> you have suitable workers there (if you have notifications turned on)
>
> This might help you understand the flow through the queues a little more?
>
> http://www.sandywalsh.com/2012/04/openstack-nova-internals-pt1-overview.html
>
> http://www.sandywalsh.com/2012/09/openstack-nova-internals-pt2-services.html
>
> Cheers,
> Sandy
>
>
> From: openstack-bounces+sandy.walsh=rackspace.com@xxxxxxxxxxxxxxxxxxx[openstack-bounces+sandy.walsh=
> rackspace.com@xxxxxxxxxxxxxxxxxxx] on behalf of Hao Wang [
> hao.1.wang@xxxxxxxxx]
> Sent: Tuesday, October 09, 2012 11:49 PM
> To: openstack@xxxxxxxxxxxxxxxxxxx
> Subject: [Openstack] Bottleneck of message queue
>
>
> Hi guys,
>
> I am trying to figure out how the internal interaction processes within
> different modules of OpenStack. Frankly speaking, while I'm reading the
> source codes I lost myself and have to jump out again to look at OpenStack
> from out of the box. I don't know if anybody has the similiar feeling with
> me. Is there any picture I can follow to see the message flows?
>
> OpenStack is based on message queue to ensure the expansion easy. Here
> come my questions. Does anybody know the capacity of message queue? Would
> the capacity be a bottleneck of the platform?
>
> Thanks,
> Howard
>
>
>
>