Open Stack

Hi Tim,

Thank you for the information!  We'll try it out.

Edwin

On Mon, Sep 15, 2014 at 10:25 AM, Tim Bell <Tim.Bell at cern.ch> wrote:

>
>
> There were some studies done by INFN into how this could work.  See
> http://indico.cern.ch/event/272791/session/0/contribution/6/material/slides/1.pdf
> for a description. Two approaches, with a modified scheduler or potentially
> a blazar lease type.
>
>
>
> This is a particular challenge in the research and HPC private clouds
> where high levels of utilisation are very typical.
>
>
>
> Tim
>
>
>
> *From:* Digital Wonk [mailto:digitalwonk at gmail.com]
> *Sent:* 15 September 2014 19:13
> *To:* openstack-operators at lists.openstack.org
> *Subject:* [Openstack-operators] Questions about waitlisting/queuing
> provisioning requests due to capacity
>
>
>
> Hi All,
>
>
>
> Hopefully, this is the appropriate group to post these questions.   My
> organization operates a public cloud which is always at capacity due to the
> demand, and we're looking at OpenStack approaches to handle the capacity
> issue.
>
>    - What successful strategies have other groups used to deal with
>    highly utilized clouds? Obviously, increasing a monetary price for
>    resources is one approach, but barring that, what are other methods?
>    - Are there any existing schedulers, extensions, openstack projects,
>    or any forthcoming blueprints that provide the ability to wait list or
>    queue a request if resources are at capacity until resources are available
>    to satisfy that request.  I'm particularly interested in nova.
>    - Are there any commercial products that provide this wait list or
>    queuing functionality?
>
>  I came across Blazar, and it (and the notion of reservations) are
> somewhat related to waitlists but not precisely:
>
>
>
> https://wiki.openstack.org/wiki/Blazar
>
>
>
> One particular statement for delayed or scheduled reservations that
> suggests a mismatch for wait lists or queues is:
>
>
>
> "In this reservation type lease is created successfully if Blazar thinks
> there will be enough resources to process provisioning later (otherwise
> this request returns failure status)"
>
>
>
> What if the cloud is always full?
>
>
>
> Thanks in advance for the responses.
>
>
>
> Edwin
>
>
>
>
>
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