
<div dir="ltr"><div><div>I noticed that there is already a bp in oslo tracing what I want to do: <a href="https://blueprints.launchpad.net/oslo/+spec/oslo-scheduler">https://blueprints.launchpad.net/oslo/+spec/oslo-scheduler</a><br>

<br></div>Thanks,<br><br></div>Jay<br><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/11/9 Jay Lau <span dir="ltr"><<a href="mailto:jay.lau.513@gmail.com" target="_blank">jay.lau.513@gmail.com</a>></span><br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


Greetings,</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


<br></div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


Now in oslo, we already put some scheduler filters/weights logic there and cinder is using oslo scheduler filters/weights logic, seems we want both nova&cinder use this logic in future.</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


<br></div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


Found some problems as following:</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


1) In cinder, some filters/weight logic reside in cinder/openstack/common/scheduler and some filter/weight logic in cinder/scheduler, this is not consistent and also will make some cinder hackers confused: where shall I put the scheduler filter/weight.</div>


<div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">

2) Nova is not using filter/weight from oslo and also not using entry point to handle all filter/weight.</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


3) There is not enough filters in oslo, we may need to add more there: such as same host filter, different host filter, retry filter etc.</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


<br></div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


So my proposal is as following:</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


1) Add more filters to oslo, such as same host filter, different host filter, retry filter etc.</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


2) Move all filters/weight logic in cinder from cinder/scheduler to cinder/openstack/common/scheduler</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


3) Enable nova use filter/weight logic from oslo (Move all filter logic to nova/openstack/common/scheduler) and also use entry point to handle all filters/weight logic.</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


<br></div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


Comments?</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


<br></div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


Thanks,</div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


<br></div><div style="line-height:normal;text-indent:0px;letter-spacing:normal;font-variant:normal;text-transform:none;font-style:normal;font-size:14px;white-space:normal;font-family:微软雅黑;font-weight:normal;word-spacing:0px">


Jay</div></div>

</blockquote></div><br></div>