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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I don’t really like the idea of Nova pre-caching ports just in case – that would mean that a user who comes into the Quantum APi my now find their port quota
exceeded because Nova is holding them in its cache<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Phil<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Gary Kotton [mailto:gkotton@redhat.com]
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<b>Sent:</b> 18 May 2013 15:48<br>
<b>To:</b> Aaron Rosen<br>
<b>Cc:</b> OpenStack Development Mailing List<br>
<b>Subject:</b> Re: [openstack-dev] [Nova][Quantum] Move quantum port creation to nova-api<o:p></o:p></span></p>
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<p class="MsoNormal">On 05/16/2013 05:02 PM, Aaron Rosen wrote: <o:p></o:p></p>
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<p class="MsoNormal">On Wed, May 15, 2013 at 10:59 PM, Gary Kotton <<a href="mailto:gkotton@redhat.com" target="_blank">gkotton@redhat.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">On 05/15/2013 10:53 PM, Aaron Rosen wrote: <o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi, <o:p></o:p></p>
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<p class="MsoNormal">I created the following blueprint and wanted to hear what the community though before starting on it.
<o:p></o:p></p>
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<a href="https://blueprints.launchpad.net/nova/+spec/nova-api-quantum-create-port" target="_blank">https://blueprints.launchpad.net/nova/+spec/nova-api-quantum-create-port</a><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">In the BP you wrote: "The only downside I see of moving this logic into nova-api is that we would slow down the response time from nova-api to provision instances."<br>
<br>
This can be addressed by nova prefetching quantum ports. When nova needs a port is can be retrieved from a cached pool. This may be a way of addressing this at a later stage if the nova api is indeed a bottleneck when it comes to the quantum interface (please
note that this currently happens on the compute node at the moment)<o:p></o:p></p>
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<p class="MsoNormal">If there are ports that are preallocated and cached in a pool of available ports on the nova-api node this won't work if running multiple nova-api nodes with a load balancer in front.
<o:p></o:p></p>
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Why? It is just an implementation detail. This information can be maintained in the nova database.<br>
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<o:p></o:p></p>
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<p class="MsoNormal">Thanks<br>
Gary<br>
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<o:p></o:p></p>
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<p class="MsoNormal">Thanks, <br>
<br>
Aaron<o:p></o:p></p>
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<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>OpenStack-dev mailing list<o:p></o:p></pre>
<pre><a href="mailto:OpenStack-dev@lists.openstack.org" target="_blank">OpenStack-dev@lists.openstack.org</a><o:p></o:p></pre>
<pre><a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a><o:p></o:p></pre>
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_______________________________________________<br>
OpenStack-dev mailing list<br>
<a href="mailto:OpenStack-dev@lists.openstack.org">OpenStack-dev@lists.openstack.org</a><br>
<a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a><o:p></o:p></p>
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