<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 12 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
text-align:justify;
text-justify:inter-ideograph;
font-size:10.5pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.5pt;
font-family:"Calibri","sans-serif";}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0cm;
margin-bottom:.0001pt;
text-align:justify;
text-justify:inter-ideograph;
font-size:8.0pt;
font-family:"Calibri","sans-serif";}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Calibri","sans-serif";}
span.small1
{mso-style-name:small1;
font-weight:normal;}
span.sortkey1
{mso-style-name:sortkey1;
display:none;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";}
.MsoChpDefault
{mso-style-type:export-only;}
/* Page Definitions */
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="2050" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="ZH-CN" link="blue" vlink="purple" style="text-justify-trim:punctuation">
<div class="WordSection1">
<p class="MsoPlainText"><span lang="EN-US">Dear Thierry,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Thanks for your suggestion.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">It is submitted as below.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><a href="http://summit.openstack.org/cfp/create">http://summit.openstack.org/cfp/create</a><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<table class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" width="100%" style="width:100.0%;border-collapse:collapse;border:none">
<tbody>
<tr>
<td style="border-top:solid #DDDDDD 1.0pt;border-left:none;border-bottom:solid #DDDDDD 1.0pt;border-right:none;background:#EEEEEE;padding:1.85pt 4.7pt 1.85pt 2.35pt">
<p class="MsoNormal" style="margin-bottom:16.8pt"><b><span lang="EN-US" style="color:#535353"><span class="MsoHyperlink"><span style="color:#535353">Topic</span></span><span style="color:windowtext;font-weight:normal"><b><span style="color:#535353"><img border="0" width="9" height="6" id="Picture_x0020_1" src="cid:image001.gif@01CF549F.7E8B37E0" alt="http://summit.openstack.org/media/arrowBlank"></span></b></span></span></b><b><span lang="EN-US" style="color:#535353"><o:p></o:p></span></b></p>
</td>
<td style="border-top:solid #DDDDDD 1.0pt;border-left:none;border-bottom:solid #DDDDDD 1.0pt;border-right:none;background:#EEEEEE;padding:1.85pt 4.7pt 1.85pt 2.35pt">
<p class="MsoNormal"><b><span lang="EN-US" style="color:#535353"><span class="MsoHyperlink"><span style="color:#535353">Title</span></span><span style="color:windowtext;font-weight:normal"><b><span style="color:#535353"><img border="0" width="9" height="6" id="Picture_x0020_2" src="cid:image001.gif@01CF549F.7E8B37E0" alt="http://summit.openstack.org/media/arrowBlank"></span></b></span>
</span></b><span class="small1"><span lang="EN-US" style="color:#535353">(Click to view/edit)</span></span><b><span lang="EN-US" style="color:#535353"><o:p></o:p></span></b></p>
</td>
<td style="border-top:solid #DDDDDD 1.0pt;border-left:none;border-bottom:solid #DDDDDD 1.0pt;border-right:none;background:#EEEEEE;padding:1.85pt 4.7pt 1.85pt 2.35pt">
<p class="MsoNormal"><b><span lang="EN-US" style="color:#535353"><span class="MsoHyperlink"><span style="color:#535353">Proposer</span></span><span style="color:windowtext;font-weight:normal"><b><span style="color:#535353"><img border="0" width="9" height="6" id="Picture_x0020_3" src="cid:image001.gif@01CF549F.7E8B37E0" alt="http://summit.openstack.org/media/arrowBlank"></span></b></span></span></b><b><span lang="EN-US" style="color:#535353"><o:p></o:p></span></b></p>
</td>
<td style="border-top:solid #DDDDDD 1.0pt;border-left:none;border-bottom:solid #DDDDDD 1.0pt;border-right:none;background:#EEEEEE;padding:1.85pt 4.7pt 1.85pt 2.35pt">
<p class="MsoNormal" align="right" style="text-align:right"><b><span lang="EN-US" style="color:#535353"><span class="MsoHyperlink"><span style="color:#535353">Status</span></span><span style="color:windowtext;font-weight:normal"><b><span style="color:#535353"><img border="0" width="9" height="6" id="Picture_x0020_4" src="cid:image001.gif@01CF549F.7E8B37E0" alt="http://summit.openstack.org/media/arrowBlank"></span></b></span></span></b><b><span lang="EN-US" style="color:#535353"><o:p></o:p></span></b></p>
</td>
</tr>
<tr>
<td style="border:none;border-bottom:solid #DDDDDD 1.0pt;padding:1.85pt 4.7pt 0cm 2.35pt">
<p class="MsoNormal"><span lang="EN-US" style="color:#535353">Neutron</span><span lang="EN-US" style="color:#535353"><o:p></o:p></span></p>
</td>
<td style="border:none;border-bottom:solid #DDDDDD 1.0pt;padding:1.85pt 4.7pt 0cm 2.35pt">
<p class="MsoNormal"><span lang="EN-US" style="color:#535353"><a href="http://summit.openstack.org/cfp/details/270">Scaling Network Performance for Large Clouds</a>
</span><span lang="EN-US" style="color:#535353"><o:p></o:p></span></p>
</td>
<td style="border:none;border-bottom:solid #DDDDDD 1.0pt;padding:1.85pt 4.7pt 0cm 2.35pt">
<p class="MsoNormal"><span lang="EN-US" style="color:#535353">Tina Tsou</span><span lang="EN-US" style="color:#535353"><o:p></o:p></span></p>
</td>
<td style="border:none;border-bottom:solid #DDDDDD 1.0pt;padding:1.85pt 4.7pt 0cm 2.35pt">
<p class="MsoNormal" align="right" style="text-align:right"><span class="sortkey1"><span lang="EN-US" style="color:#535353">U</span></span><span lang="EN-US" style="color:#535353"> Unreviewed
</span><span lang="EN-US" style="color:#535353"><o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoPlainText"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Thank you,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Tina<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">-----Original Message-----<br>
From: Thierry Carrez [mailto:thierry@openstack.org] <br>
Sent: Wednesday, April 09, 2014 6:36 PM<br>
To: openstack-dev@lists.openstack.org<br>
Subject: Re: [openstack-dev] Session suggestions for the Juno Design Summit now open<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Tina TSOU wrote:<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> Below is our proposal. Look forward to your feedback.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> --------------<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> Description<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> This session focuses on how to improve networking performance at large scale deployment.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> For example<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> - having many VMs, thousands to tens of thousands, in a single data
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> center<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> - very heavy traffic between VMs of different physical servers<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> - large quantities of OpenFlow flow tables causing slow forwarding on
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> OVS and high CPU usage on hypervisor<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> - VMs belong to various tenants thus requiring traffic isolation and
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> security and lots of configuration on OVS mainly overlay encapsulation
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> and OpenFlow tables<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> - neutron server taking too long time to process requests<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> We are introducing a solution designed for the above scenario in this area.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> The main idea is to deploy on the hypervisor a new monitor agent which will periodically check the CPU usage and network load of the NIC and inform SDN controller through plugin/API extension. If the OVS load goes
very high, SDN controller can reactively off-load the traffic from OVS to TOR with minimum interruption. It means that initially, the overlay encapsulation might be done on OVS, but some feature rich TORs also provide this functionality which makes TOR capable
of taking over whenever necessary. The same strategy will be applied for OpenFlow flow table. By doing this, OVS will have nothing to do other than sending the traffic to TOR. All the time-consuming jobs will be taken over by TOR dynamically. This more advanced
strategy does require TOR to be feature-rich so it might cause more TCO. <o:p>
</o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> We believe this is worth doing for large scale deployment.
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">> --------------<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">You should file it at summit.openstack.org so that it can be considered for inclusion in the schedule.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">--<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Thierry Carrez (ttx)<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">_______________________________________________<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">OpenStack-dev mailing list<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><a href="mailto:OpenStack-dev@lists.openstack.org"><span style="color:windowtext;text-decoration:none">OpenStack-dev@lists.openstack.org</span></a><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev"><span style="color:windowtext;text-decoration:none">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</span></a><o:p></o:p></span></p>
</div>
</body>
</html>