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<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#1F497D">IMO, Neutron and Cinder are both not ready for ‘Cell’. In current implementation, Neutron and Cinder both don’t know anything about cells, I’m afraid it’s just
an experimental feature.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#1F497D">And , in a large scale deployment(maybe multi-DC), we should consider the performance of volumes and network across cells, using Neutron and Cinder as shared services.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="text-autospace:none"><b><span lang="EN-US" style="font-family:"微软雅黑","sans-serif";color:black">------------------------------------------------------------<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><b><span lang="EN-US" style="font-size:10.5pt;font-family:"微软雅黑","sans-serif";color:#00B0F0">Lingxian Kong<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><b><span lang="EN-US" style="font-size:10.5pt;font-family:"微软雅黑","sans-serif";color:red">Huawei Technologies Co.,LTD.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif";color:#1F497D">IT Product Line CloudOS PDU<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-align:justify;text-justify:inter-ideograph"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif";color:#1F497D">China, Xi'an<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-align:justify;text-justify:inter-ideograph"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif";color:#1F497D">Mobile: +86-18602962792<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-align:justify;text-justify:inter-ideograph"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif";color:#1F497D">Email: konglingxian@huawei.com</span></b><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></b></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#1F497D"><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"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Addepalli Srini-B22160 [mailto:B22160@freescale.com]
<br>
<b>Sent:</b> Sunday, September 01, 2013 4:14 AM<br>
<b>To:</b> OpenStack Development Mailing List<br>
<b>Subject:</b> Re: [openstack-dev] Cells - Neutron Service<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks. That link was helpful.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">So, I take it that Neutron is a shared service across cells. Since it is a shared services, I guess virtual networks based on VXLAN, VLAN,
GRE technologies can be realized across compute nodes. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Srini
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><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"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Qiu Yu [mailto:unicell@gmail.com]
<br>
<b>Sent:</b> Friday, August 30, 2013 9:10 AM<br>
<b>To:</b> OpenStack Development Mailing List<br>
<b>Subject:</b> Re: [openstack-dev] Cells - Neutron Service<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">I found this launchpad discussion, in which Aaron mentioned about network awareness integration with nova cells.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><a href="https://answers.launchpad.net/neutron/+question/228815">https://answers.launchpad.net/neutron/+question/228815</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Could anyone share some pointers in that direction? Thanks!<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Best Regards,<br clear="all">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">--<br>
Qiu Yu<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">On Fri, Aug 30, 2013 at 6:40 AM, Ravi Chunduru <<a href="mailto:ravivsn@gmail.com" target="_blank">ravivsn@gmail.com</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Its an interesting discussion you brought up today. I agree there is no clear definition of neutron service in that table. The cell goes by its definition of ability to create instance anywhere. Then there needs to be
inter-vm communication for a given network. <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">I feel Neutron must be shared service in Cells. Such depth is missing in Neutron today.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Any thoughts?<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">-Ravi.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">On Thu, Aug 29, 2013 at 8:00 AM, Addepalli Srini-B22160 <<a href="mailto:B22160@freescale.com" target="_blank">B22160@freescale.com</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">While developing some neutron extensions, one question came up on Cells. Appreciate any comments.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">According to this table in operations guide, a cell shares nova-api and keystone, but does not talk about other services.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I understand from few that Neutron service need to be shared across cells if virtual networks are to be extended to multiple cells. Otherwise, neutron service
can be dedicated to each cell.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I guess anybody developing neutron related extensions need to take care both scenarios.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Is that understanding correct?
<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Also which deployments are more common – Shared Neutron or dedicated neutrons?<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Thanks<br>
Srini<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
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<td style="border:none;background:gray;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:15.0pt"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:white">Cells</span></b><span lang="EN-US"><o:p></o:p></span></p>
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<td style="border:none;background:gray;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:15.0pt"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:white">Regions</span></b><span lang="EN-US"><o:p></o:p></span></p>
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<td style="border:none;background:gray;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:15.0pt"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:white">Availability Zones</span></b><span lang="EN-US"><o:p></o:p></span></p>
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<td style="border:none;background:gray;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:15.0pt"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:white">Host Aggregates</span></b><span lang="EN-US"><o:p></o:p></span></p>
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<p><strong><span lang="EN-US" style="font-family:"Verdana","sans-serif"">Use when you need</span></strong><span lang="EN-US">
<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p><span lang="EN-US">A single <a href="http://docs.openstack.org/trunk/openstack-ops/content/scaling.html" target="_blank">
<span style="border:dotted green 1.0pt;padding:0cm;background:#FFFFEE;text-decoration:none">API endpoint</span></a> for compute, or you require a second level of scheduling.<o:p></o:p></span></p>
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<p><span lang="EN-US">Discrete regions with separate API endpoints and no coordination between regions.<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p><span lang="EN-US">Logical separation within your nova deployment for physical isolation or redundancy.<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p><span lang="EN-US">To schedule a group of hosts with common features.<o:p></o:p></span></p>
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<p><strong><span lang="EN-US" style="font-family:"Verdana","sans-serif"">Example</span></strong><span lang="EN-US">
<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p><span lang="EN-US">A cloud with multiple sites where you can schedule VMs "anywhere" or on a particular site.<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p><span lang="EN-US">A cloud with multiple sites, where you schedule VMs to a particular site and you want a shared infrastructure.<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p><span lang="EN-US">A single site cloud with equipment fed by separate power supplies.<o:p></o:p></span></p>
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<p><span lang="EN-US">Scheduling to hosts with trusted hardware support.<o:p></o:p></span></p>
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<p><strong><span lang="EN-US" style="font-family:"Verdana","sans-serif"">Overhead</span></strong><span lang="EN-US">
<o:p></o:p></span></p>
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<p style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt">
</span><span lang="EN-US">A new service, </span><code><span lang="EN-US" style="font-size:10.0pt">nova-</span></code><span lang="EN-US" style="font-family:"Courier New"">cell</span><code><span lang="EN-US" style="font-size:10.0pt">s</span></code><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt">
</span><span lang="EN-US">Each cell has a full nova installation except </span><code><span lang="EN-US" style="font-size:10.0pt">nova-api</span></code><span lang="EN-US"><o:p></o:p></span></p>
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<p style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt">
</span><span lang="EN-US">A different API endpoint for every region. <o:p></o:p></span></p>
<p style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt">
</span><span lang="EN-US">Each region has a full nova installation.<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt">
</span><span lang="EN-US">Configuration changes to nova.conf<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p style="margin-left:36.0pt"><span lang="EN-US" style="font-family:Symbol">·</span><span lang="EN-US" style="font-size:7.0pt">
</span><span lang="EN-US">Configuration changes to nova.conf<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p><strong><span lang="EN-US" style="font-family:"Verdana","sans-serif"">Shared services</span></strong><span lang="EN-US">
<o:p></o:p></span></p>
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<p><span lang="EN-US">Keystone<o:p></o:p></span></p>
<p><code><span lang="EN-US" style="font-size:10.0pt">nova-api</span></code><span lang="EN-US">
<o:p></o:p></span></p>
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<p><span lang="EN-US">Keystone<o:p></o:p></span></p>
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<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p><span lang="EN-US">Keystone<o:p></o:p></span></p>
<p><span lang="EN-US">All nova services<o:p></o:p></span></p>
</td>
<td style="border:solid black 1.0pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p><span lang="EN-US">Keystone<o:p></o:p></span></p>
<p><span lang="EN-US">All nova services<o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">_______________________________________________<br>
OpenStack-dev mailing list<br>
<a href="mailto:OpenStack-dev@lists.openstack.org" target="_blank">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></span></p>
</blockquote>
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<p class="MsoNormal"><span lang="EN-US" style="color:#888888"><br>
<br clear="all">
<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US" style="color:#888888"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US" style="color:#888888">-- <br>
Ravi</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><br>
_______________________________________________<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></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
</div>
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