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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you very much for the answers, they are of great help.<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 will plan on attending Thursday meeting so I can see the Essex discussion.<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">Glaucimar Aguiar<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"><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""> Doug Hellmann [mailto:doug.hellmann@dreamhost.com]
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<b>Sent:</b> quarta-feira, 25 de julho de 2012 14:29<br>
<b>To:</b> Aguiar, Glaucimar (Brazil R&D-ECL); openstack@lists.launchpad.net<br>
<b>Subject:</b> Re: [Openstack] [ceilometer] requesting feedback on priorities for metering data collection<o:p></o:p></span></p>
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<p class="MsoNormal">On Wed, Jul 25, 2012 at 10:45 AM, Aguiar, Glaucimar (Brazil R&D-ECL) <<a href="mailto:glaucimar.aguiar@hp.com" target="_blank">glaucimar.aguiar@hp.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Doug,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks for sending this out. I am interested in this project and as I could not have it working yet
with my Essex release of OpenStack</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Some of the pieces work with Essex, but the actual daemons don't, yet. We are planning to discuss this at our meeting this Thursday (<a href="http://wiki.openstack.org/Meetings/MeteringAgenda">http://wiki.openstack.org/Meetings/MeteringAgenda</a>).<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I would like to better understand the metrics collected you mention below.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I have being reading the documentation and code extensively and would like to count on your help
to better understand some aspects of the ceilometer.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Some questions below, sorry if they sound so easy for you but if you could help me with these, this
would be of a great help for me.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">These are good questions, thanks for bringing them up!<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">When you say CPU usage meters, does it mean ceilometer is already capable of reporting the cpu consumption
over an hour?</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">We are currently polling libvirt periodically to get the total CPU time for an instance. The frequency of polling is adjustable, but I think the default is 10 minutes. The value returned by libvirt represents the total time for the instance,
but a client could pull the data and perform the calculation over a period of time. The API we have defined allows for querying within a time range, for example.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Does this take into account the number of CPUs of the instance or this should be derived from the
instance data?</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The number of CPUs in an instance is part of the metadata associated with the counter, but does not enter into the calculation of CPU-time as far as I know. We ask libvirt for that info, and just use what we're given.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you very much for any help in increasing my understanding of the behavior of this component.
I can also contact you in IRC if you prefer.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I hope my answers help,<o:p></o:p></p>
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<p class="MsoNormal">Doug<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Glaucimar Aguiar</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><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+glaucimar.aguiar=<a href="mailto:hp.com@lists.launchpad.net" target="_blank">hp.com@lists.launchpad.net</a>
[mailto:<a href="mailto:openstack-bounces%2Bglaucimar.aguiar" target="_blank">openstack-bounces+glaucimar.aguiar</a>=<a href="mailto:hp.com@lists.launchpad.net" target="_blank">hp.com@lists.launchpad.net</a>]
<b>On Behalf Of </b>Doug Hellmann<br>
<b>Sent:</b> quarta-feira, 25 de julho de 2012 11:24<br>
<b>To:</b> <a href="mailto:openstack-operators@lists.openstack.org" target="_blank">
openstack-operators@lists.openstack.org</a>; <a href="mailto:openstack@lists.launchpad.net" target="_blank">
openstack@lists.launchpad.net</a><br>
<b>Subject:</b> [Openstack] [ceilometer] requesting feedback on priorities for metering data collection</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">When the ceilometer project started after the Folsom summit, we compiled a list of metrics to be collected [1]. We have reached a stage in the project where we are ready to start
implementing more of these meters, and would like some input from the rest of the community about priorities. We have implemented the instance counter, disk I/O, and CPU usage meters, and have begun working on collecting some of the network statistics. If
you are interested in using ceilometer for tracking usage in your cloud deployment, please let us know which other metrics you will find especially useful.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Doug<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">1 - <a href="http://wiki.openstack.org/EfficientMetering#Meters" target="_blank">http://wiki.openstack.org/EfficientMetering#Meters</a><o:p></o:p></p>
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