<html v="urn:schemas-microsoft-com:vml" o="urn:schemas-microsoft-com:office:office" w="urn:schemas-microsoft-com:office:word" m="http://schemas.microsoft.com/office/2004/12/omml"><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /><meta name="Generator" content="Microsoft Word 15 (filtered medium)" /><style><!--
/* Font Definitions */
@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;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:717895894;
mso-list-type:hybrid;
mso-list-template-ids:-7045940 67567639 67567641 67567643 67567631 67567641 67567643 67567631 67567641 67567643;}
@list l0:level1
{mso-level-number-format:alpha-lower;
mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@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:-18.0pt;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@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:-18.0pt;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@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:0cm;}
ul
{margin-bottom:0cm;}
--></style></head><body lang="DE" link="#0563C1" vlink="#954F72">does your test use the network? in B what neutron agent do you use for networking?<br>
<br>
openstack and libvirt are, at different level, control plane. you should look at the differences in the data plane<br>
<br>
<br><br><div class="gmail_quote">On June 29, 2015 7:19:45 PM GMT+08:00, "Narayanan, Krishnaprasad" <narayana@uni-mainz.de> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<!--[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]-->
<div class="WordSection1">
<p class="MsoNormal">Hello all,</p><p></p>
<p class="MsoNormal"></p><p> </p>
<p class="MsoNormal"><span lang="EN-US">I ran tests under the following settings to measure the IO performance of MySQL database. I used Sysbench as the client workload generator. I found that the performance of MySQL (both resource utilization and application)
has degraded by more than 50% after switching from setting a) to setting b). <p>
</p></span></p>
<p class="MsoNormal"><span lang="EN-US"><p> </p></span></p>
<p class="MsoNormal"><span lang="EN-US">Setting a): Controller & Compute node OS - Ubuntu 12.04, cloud software: OpenStack Havana, networking: nova-network, Hypervisor: KVM, Libvirt version: 1.1.1, QEMU version: 1.5.0, Host disk write cache: enabled, Guest
disk cache: none and host OS scheduler: CFQ.<p></p></span></p>
<p class="MsoNormal"><span lang="EN-US">Setting b): Controller & Compute node OS - Ubuntu 14.04, cloud software: OpenStack Icehouse, networking: Neutron, Hypervisor: KVM, Libvirt version: 1.2.2, QEMU version: 2.0.0, Host disk write cache: enabled, Guest disk
cache: none and host OS scheduler: CFQ.<p></p></span></p>
<p class="MsoNormal"><span lang="EN-US"><p> </p></span></p>
<p class="MsoNormal"><span lang="EN-US">May I know has anybody performed such tests and if yes, can you please share details on the IO performance of VMs and the application?<p></p></span></p>
<p class="MsoNormal"><span lang="EN-US"><p> </p></span></p>
<p class="MsoNormal"><span lang="EN-US">I don’t know whether is the right question to ask in this forum. Can somebody share information at a high level about the improvements made in Libvirt (from version 1.1.1 to 1.2.2) for handling IO requests?<p></p></span></p>
<p class="MsoNormal"><span lang="EN-US"><p> </p></span></p>
<p class="MsoNormal"><span lang="EN-US">Regards,<p></p></span></p>
<p class="MsoNormal"><span lang="EN-US">Krishnaprasad<p></p></span></p>
</div>
<p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />Mailing list: <a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</a><br />Post to : openstack@lists.openstack.org<br />Unsubscribe : <a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</a><br /></pre></blockquote></div><br>
-- <br>
1AE0 322E B8F7 4717 BDEA BF1D 44BB 1BA7 9F6C 6333<br>
<br>
Sent from mobile.</body></html>