<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 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","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.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.hoenzb
{mso-style-name:hoenzb;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:921528493;
mso-list-type:hybrid;
mso-list-template-ids:-751111780 67698703 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</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="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi,<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">I can think of two alternative solutions for maintaining uniqueness:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">DB look up: After generating a new MAC address, checking uniqueness by doing a DB look up.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Having a ‘unique’ constraint on the ‘mac_address’ column and handle the DB IntegrityError and retry generating a new MAC address.<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">I also think, initializing the ‘random.seed’ in start-up process of Quantum server (with a different value – configurable one; on each server) could help in
reducing conflicts.<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">I think either of the above solutions could be used for fixing LP bug #1050924.<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:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Thanks & Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Unmesh Gurjar</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"> | Lead Engineer |
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">NTT DATA Global Technology Services Private Limited |
<b>w.</b> +91.20.6604.1500 x 379 | <b>m.</b> +91.982.324.7631 | </span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><a href="mailto:unmesh.gurjar@nttdata.com"><span style="color:blue">unmesh.gurjar@nttdata.com</span></a> |
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Learn more at nttdata.com/americas<b><o:p></o:p></b></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"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> openstack-bounces+unmesh.gurjar=nttdata.com@lists.launchpad.net [mailto:openstack-bounces+unmesh.gurjar=nttdata.com@lists.launchpad.net]
<b>On Behalf Of </b>Neelakantam Gaddam<br>
<b>Sent:</b> Friday, October 26, 2012 11:37 AM<br>
<b>To:</b> mthode@mthode.org<br>
<b>Cc:</b> openstack@lists.launchpad.net<br>
<b>Subject:</b> Re: [Openstack] MAC address uniqueness in folsom<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Hi,<br>
<br>
We want unique MAC addresses in our environment only but across multiple tenants.<br>
<br>
Thanks for quick reply.<br>
<br>
---<br>
Neelakantam<o:p></o:p></p>
<div>
<p class="MsoNormal">On Fri, Oct 26, 2012 at 9:38 AM, Matthew Thode <<a href="mailto:mthode@mthode.org" target="_blank">mthode@mthode.org</a>> wrote:<o:p></o:p></p>
<div>
<p class="MsoNormal">On 10/25/2012 11:02 PM, Neelakantam Gaddam wrote:<br>
> Hi All,<br>
><br>
> Does the MAC address generated in quantum is unique across tenants in<br>
> folsom?<br>
> I am developing an application that requires unique MAC address. If not<br>
> unique, is there any way to make MAC address unique?<br>
><br>
> Please help me. Thanks in advance.<br>
><br>
><br>
><br>
><o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">> _______________________________________________<br>
> Mailing list: <a href="https://launchpad.net/%7Eopenstack" target="_blank">https://launchpad.net/~openstack</a><br>
> Post to : <a href="mailto:openstack@lists.launchpad.net">openstack@lists.launchpad.net</a><br>
> Unsubscribe : <a href="https://launchpad.net/%7Eopenstack" target="_blank">https://launchpad.net/~openstack</a><br>
> More help : <a href="https://help.launchpad.net/ListHelp" target="_blank">https://help.launchpad.net/ListHelp</a><br>
><br>
Do you need it to be globally unique (amongst all macs on earth) or<br>
simply unique in your environment?<br>
<span style="color:#888888"><br>
<span class="hoenzb">--</span><br>
<span class="hoenzb">-- Matthew Thode</span><br>
<br>
</span><br>
_______________________________________________<br>
Mailing list: <a href="https://launchpad.net/%7Eopenstack" target="_blank">https://launchpad.net/~openstack</a><br>
Post to : <a href="mailto:openstack@lists.launchpad.net">openstack@lists.launchpad.net</a><br>
Unsubscribe : <a href="https://launchpad.net/%7Eopenstack" target="_blank">https://launchpad.net/~openstack</a><br>
More help : <a href="https://help.launchpad.net/ListHelp" target="_blank">https://help.launchpad.net/ListHelp</a><o:p></o:p></p>
</div>
<p class="MsoNormal"><br>
<br clear="all">
<br>
-- <br>
Thanks & Regards<br>
Neelakantam Gaddam<o:p></o:p></p>
</div>
<br clear="both">
______________________________________________________________________<BR>
Disclaimer:This email and any attachments are sent in strictest confidence for the sole use of the addressee and may contain legally privileged, confidential, and proprietary data. If you are not the intended recipient, please advise the sender by replying promptly to this email and then delete and destroy this email and any attachments without any further use, copying or forwarding<BR>
</body>
</html>