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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">We’re using the cinder IOPS throttling which seems to work well. The default volume type is rate limited so that the standard requests
don’t overload the ceph pool and the high IOPS is reserved for those apps that need it.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">We’ve not used glance throttling (but the load is much less in our environment)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Tim<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Joe Topjian [mailto:joe@topjian.net]
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<b>Sent:</b> 23 October 2014 19:42<br>
<b>To:</b> Craig Jellick<br>
<b>Cc:</b> openstack-operators@lists.openstack.org; openstack@lists.openstack.org<br>
<b>Subject:</b> Re: [Openstack-operators] [nova] instance resource quota quesetions<o:p></o:p></span></p>
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<p class="MsoNormal">I can confidently say that throttling will work with KVM. I think both virt_types will work since libvirt is controlling everything in the end.<o:p></o:p></p>
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<p class="MsoNormal">One caveat about IO throttling to keep in mind is that the Nova settings are not applied to volumes -- just the root and ephemeral disk. We were unable to verify if IO throttling through Cinder worked due to this bug:<o:p></o:p></p>
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<p class="MsoNormal"><a href="https://bugs.launchpad.net/nova/+bug/1362129" target="_blank">https://bugs.launchpad.net/nova/+bug/1362129</a><o:p></o:p></p>
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<p class="MsoNormal">For bandwidth, I want to say that it is agnostic to nova-network and Neutron since it happens at the libvirt layer, but I am not 100% sure as I've never tested the settings on both.<o:p></o:p></p>
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<p class="MsoNormal">It's safe to test these settings live (IMO). If you figure out the correct "virsh" commands to use to apply the settings, you can run them directly on the compute node against a test instance and no other instances will be affected.<o:p></o:p></p>
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<p class="MsoNormal">Hope that helps,<o:p></o:p></p>
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<p class="MsoNormal">Joe <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Thu, Oct 23, 2014 at 11:20 AM, Craig Jellick <<a href="mailto:cjellick@godaddy.com" target="_blank">cjellick@godaddy.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Hello,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">I have a few questions regarding the instance resource quota feature in nova which is documented here: <a href="https://wiki.openstack.org/wiki/InstanceResourceQuota" target="_blank">https://wiki.openstack.org/wiki/InstanceResourceQuota</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">First, the section on disk IO states "IO throttling are handled by QEMU.” Does this mean that this feature only works when the hypervisor is QEMU (virt_type = QEMU
in nova.conf) or will this feature work with KVM?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Second, this feature also allows control over network bandwidth. Will that work if you are using neutron or does it only work if you’re using nova-network? Our
setup is neutron w/ ml2+ovs with the ovs agent living on each compute node.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">/Craig J<o:p></o:p></span></p>
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