Open Stack

On Mon, Apr 20, 2015 at 12:07 PM, Fox, Kevin M <Kevin.Fox at pnnl.gov> wrote:

> Another parallel is Manilla vs Swift. Both provides something like a share
> for users to store files.
>
> The former is a multitenant api to provision non multitenant file shares.
> The latter is a multitenant api to provide file sharing.
>
> Cue is a multitenant api to provision non multitenant queues.
> Zaqar is an api for a multitenant queueing system.
>
> They are complimentary services.
>
>
Agreed, it’s not an either/or, there is room for both.  While Cue could
provision Zaqar, it doesn’t make sense, since it is already multi-tenant.
As has been said, Cue’s goal is to bring non-multi-tenant message brokers
to the cloud.

On the question of adoption, what confuses me is why the measurement of
success of a project is whether other OpenStack services are integrating or
not.  Zaqar exposes an API that seems best fit for application workloads
running on an OpenStack cloud.  The question should be raised to operators
as to what’s preventing them from running Zaqar in their public cloud,
distro, or whatever.

Looking at other services that we consider to be successful, such as Trove,
we did not attempt to integrate with other OpenStack projects.  Rather, we
solved the concerns that operators had.



> Thanks,
> Kevin
> ________________________________________
> From: Ryan Brown [rybrown at redhat.com]
> Sent: Monday, April 20, 2015 11:38 AM
> To: openstack-dev at lists.openstack.org
> Subject: Re: [openstack-dev] [Zaqar] Call for adoption (or exclusion?)
>
> On 04/20/2015 02:22 PM, Michael Krotscheck wrote:
> > What's the difference between openstack/zaqar and stackforge/cue?
> > Looking at the projects, it seems like zaqar is a ground-up
> > implementation of a queueing system, while cue is a provisioning api for
> > queuing systems that could include zaqar, but could also include rabbit,
> > zmq, etc...
> >
> > If my understanding of the projects is correct, the latter is far more
> > versatile, and more in line with similar openstack approaches like
> > trove. Is there a use case nuance I'm not aware of that warrants
> > duplicating efforts? Because if not, one of the two should be retired
> > and development focused on the other.
> >
> > Note: I do not have a horse in this race. I just feel it's strange that
> > we're building a thing that can be provisioned by the other thing.
> >
>
> Well, with Trove you can provision databases, but the MagnetoDB project
> still provides functionality that trove won't.
>
>
> The Trove : MagnetoDB and Cue : Zaqar comparison fits well.
>
> Trove provisions one instance of X (some database) per tenant, where
> MagnetoDB is one "instance" (collection of hosts to do database things)
> that serves many tenants.
>
> Cue's goal is "I have a not-very-multitenant message bus (rabbit, or
> whatever)" and makes that multitenant by provisioning one per tenant,
> while Zaqar has a single install (of as many machines as needed) to
> support messaging for all cloud tenants. This enables great stuff like
> cross-tenant messaging, better physical resource utilization in
> sparse-tenant cases, etc.
>
> As someone who wants to adopt Zaqar, I'd really like to see it continue
> as a project because it provides things other message broker approaches
> don't.
>
> --
> Ryan Brown / Software Engineer, Openstack / Red Hat, Inc.
>
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