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<div>Quickstart guide should be dead dead dead dead simple. The goal of the quickstart guide isn’t to tach people best practices around Magnum. It is to get a developer operational to give them that sense of feeling that Magnum can be worked on. The goal
of any quickstart guide should be to encourage the thinking that a person involving themselves with the project the quickstart guide represents is a good use of the person’s limited time on the planet.</div>
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<div>Regards</div>
<div>-steve</div>
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<span style="font-weight:bold">From: </span>Hongbin Lu <<a href="mailto:hongbin.lu@huawei.com">hongbin.lu@huawei.com</a>><br>
<span style="font-weight:bold">Reply-To: </span>"OpenStack Development Mailing List (not for usage questions)" <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br>
<span style="font-weight:bold">Date: </span>Thursday, October 8, 2015 at 9:00 AM<br>
<span style="font-weight:bold">To: </span>"OpenStack Development Mailing List (not for usage questions)" <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br>
<span style="font-weight:bold">Subject: </span>[openstack-dev] [magnum] Document adding --memory option to create containers<br>
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<p class="MsoNormal"><span style="color:#1F497D">Hi team,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I want to move the discussion in the review below to here, so that we can get more feedback<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><a href="https://review.openstack.org/#/c/232175/">https://review.openstack.org/#/c/232175/</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">In summary, magnum currently added support for specifying the memory size of containers. The specification of the memory size is optional, and the COE won’t reserve any memory to the containers with unspecified
memory size. The debate is whether we should document this optional parameter in the quickstart guide. Below is the positions of both sides:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Pros:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="color: rgb(31, 73, 125);"><span style="mso-list:Ignore">·<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span style="color:#1F497D">It is a good practice to always specifying the memory size, because containers with unspecified memory size won’t have QoS guarantee.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="color: rgb(31, 73, 125);"><span style="mso-list:Ignore">·<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span style="color:#1F497D">The in-development autoscaling feature [1] will query the memory size of each container to estimate the residual capacity and triggers scaling accordingly. Containers with unspecified memory size
will be treated as taking 0 memory, which negatively affects the scaling decision.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Cons:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l1 level1 lfo2"><!--[if !supportLists]--><span style="color: rgb(31, 73, 125);"><span style="mso-list:Ignore">·<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span style="color:#1F497D">The quickstart guide should be kept as simple as possible, so it is not a good idea to have the optional parameter in the guide.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thoughts?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">[1] <a href="https://blueprints.launchpad.net/magnum/+spec/autoscale-bay">
https://blueprints.launchpad.net/magnum/+spec/autoscale-bay</a><o:p></o:p></span></p>
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