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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Sorry, I’m not quite clear about it yet.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">I’m trying to find a way that heat controls the flow but not the nova scheduler.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt">发件人<span lang="EN-US">:</span></span></b><span lang="EN-US" style="font-size:10.0pt"> Henrique Truta [mailto:henriquecostatruta@gmail.com]
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</span><b><span style="font-size:10.0pt">发送时间<span lang="EN-US">:</span></span></b><span lang="EN-US" style="font-size:10.0pt"> 2014</span><span style="font-size:10.0pt">年<span lang="EN-US">4</span>月<span lang="EN-US">14</span>日<span lang="EN-US"> 21:39<br>
</span><b>收件人<span lang="EN-US">:</span></b><span lang="EN-US"> OpenStack Development Mailing List (not for usage questions)<br>
</span><b>主题<span lang="EN-US">:</span></b><span lang="EN-US"> Re: [openstack-dev] [heat][nova]dynamic scheduling<o:p></o:p></span></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">Hello!<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">I'm currently investigating both of these features you have mentioned, specifically on the NEAT[1] and GANTT[2] projects, as you might see on the last week discussion.
<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">Do you have any further ideas about how and why this would work with Heat?<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Henrique<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">[1] <a href="http://openstack-neat.org/">
http://openstack-neat.org/</a><br>
[2] <a href="https://github.com/openstack/gantt">https://github.com/openstack/gantt</a><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">2014-04-13 22:53 GMT-03:00 Jiangying (Jenny) <<a href="mailto:jenny.jiangying@huawei.com" target="_blank">jenny.jiangying@huawei.com</a>>:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Courier New"">Hi,
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Courier New"">there has been a heated discussion about dynamic scheduling last week.(<a href="http://www.mail-archive.com/openstack-dev@lists.openstack.org/msg21644.html" target="_blank">http://www.mail-archive.com/openstack-dev@lists.openstack.org/msg21644.html</a>)</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Courier New"">I am also interested in this topic. We believe that dynamic scheduling consists of two parts: balancing computing capacity and
optimizing power consumption.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Courier New"">For balancing computing capacity, the ceilometer periodically monitors distribution and usage of CPU and memory resources for
hosts and virtual machines. Based on the information, the scheduler calculates the current system standard deviation metric and determines the system imbalance by comparing it to the target. To resolve the imbalance, the scheduler gives the suitable virtual
machine migration suggestions to nova. In this way, the dynamic scheduling achieves higher consolidation ratios and deliver optimized performance for the virtual machines.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Courier New"">For optimizing power consumption, we attempt to keep the resource utilization of each host within a specified target range.
The scheduler evaluates if the goal can be reached by balancing the system workloads. If the resource utilization of a host remains below the target, the scheduler calls nova to power off some hosts. Conversely the scheduler powers on hosts to absorb the additional
workloads. Thus optimizing power consumption offers an optimum mix of resource availability and power savings.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Courier New"">As Chen CH Ji said, “nova is a cloud solution that aim to control virtual / real machine lifecycle management the dynamic scheduling
mechanism is something like optimization of the cloud resource”. We think implementing the dynamic scheduling with heat may be a good attempt.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Courier New"">Do you have any comments?</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Courier New"">Thanks,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Courier New"">Jenny</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif""> </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><br>
_______________________________________________<br>
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<a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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