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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Thanks for your reply.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">The workload is a client server model where both the VMs are running on different hosts. Yes it involves network as they are on different hosts but its impact is negligible. The networking agent
used is “neutron-openvswitch-agent” on the compute node.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">I will have a look in the differences in the data plane.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:DE">From:</span></b><span lang="EN-US" style="mso-fareast-language:DE"> gustavo panizzo (gfa) [mailto:gfa@zumbi.com.ar]
<br>
<b>Sent:</b> Montag, 29. Juni 2015 13:39<br>
<b>To:</b> Narayanan, Krishnaprasad; 'openstack@lists.openstack.org'<br>
<b>Subject:</b> Re: [Openstack] MySQL IO performance<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" style="margin-bottom:12.0pt"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:DE">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>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:DE">On June 29, 2015 7:19:45 PM GMT+08:00, "Narayanan, Krishnaprasad" <</span><a href="mailto:narayana@uni-mainz.de"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:DE">narayana@uni-mainz.de</span></a><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:DE">>
wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Hello all,<o:p></o:p></span></p>
<p><span lang="EN-US"> <o:p></o:p></span></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). <o:p>
</o:p></span></p>
<p><span lang="EN-US"> <o:p></o: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.<o:p></o: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.<o:p></o:p></span></p>
<p><span lang="EN-US"> <o:p></o: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?<o:p></o:p></span></p>
<p><span lang="EN-US"> <o:p></o: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?<o:p></o:p></span></p>
<p><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Krishnaprasad<o:p></o:p></span></p>
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<pre><span lang="EN-US"><br>Mailing list: </span><a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack"><span lang="EN-US">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</span></a><span lang="EN-US"><br>Post to : </span><a href="mailto:openstack@lists.openstack.org"><span lang="EN-US">openstack@lists.openstack.org</span></a><span lang="EN-US"><br>Unsubscribe : </span><a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack"><span lang="EN-US">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</span></a><span lang="EN-US"><o:p></o:p></span></pre>
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