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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Hi Tim, All,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l3 level1 lfo2">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Step 3: The VM-placement engine is also a “datalog engine” . Right?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">When policies are delegated:
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:17.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">when policies are inserted? When the VM-placement engine has already registered itself all policies
are given to it?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:17.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:17.4pt"><span lang="EN-US">“In our example, this would mean the domain-specific policy engine executes the following API call over the DSE”<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:53.4pt;text-indent:-18.0pt;mso-list:l0 level1 lfo5">
<![if !supportLists]><span lang="EN-US" style="font-family:Wingdings"><span style="mso-list:Ignore">ð<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">“domain-agnostic” ….</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l3 level1 lfo2">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Step 4:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Ok<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">But finally: if Congress will likely “delegate”
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l3 level1 lfo2">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Step 5: Compilation of subpolicy to LP in VM-placement engine<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:35.4pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">For the PoC, it is likely that the LP program ( in PuLP or some other ML) is *<b>not</b>* completely generated by
compiler/translator.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:53.4pt;text-indent:-18.0pt;mso-list:l2 level1 lfo3">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:Wingdings;color:black"><span style="mso-list:Ignore">ð<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Right?<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> You also indicate that some category of constraints (“</span><span lang="EN-US">the LP solver doesn’t know what the
relationship between assign[i][j], hMemUse[j], and vMemUse[i] actually is, so the VM-placement engine must also include constraints”) .<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US"> </span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">These constraints must be “explicitly” written?</span><span lang="EN-US">
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">(e.g. max_ram_allocation etc that are constraints used in the solver-scheduler’s package).<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> So what “parts” will be generated:
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> Cost function :
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> Constraint from Policy : memory usage < 75%
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> Then the rest should be “filled” up?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> Could we convene on an intermediary “modeling language”?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> @Yathi: do you think we could use some thing like AMPL ? Is this proprietary?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> A detail: the example “</span><span lang="EN-US" style="font-family:"Courier New"">Y[host1] = hMemUse[host1] > 0.75 * hMemCap[host1]</span><span lang="EN-US">”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:53.4pt;text-indent:-18.0pt;mso-list:l2 level1 lfo3">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:Wingdings;color:black"><span style="mso-list:Ignore">ð<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">To be changed to a linear form (mi – Mi > 0 then Yi = 1 else Yi = 0) so something like (mi – Mi) < 100 yi<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l3 level1 lfo2">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><span style="mso-list:Ignore">4)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Step 6: This is completely internal to the VM-placement engine (and we could say this is “transparent” to Congress)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">We should allow configuration of a solver (this itself could be a policy
</span><span lang="EN-US" style="font-size:10.0pt;font-family:Wingdings;color:black">J</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> )<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">How to invoke the solver API ? <o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">The domain-specific placement engine could send out to DSE (action_handler: data)?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">3) Step 7 : Perform the migrations (according to the assignments computed in the step 6)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> This part invokes OpenStack API (to perform migrations).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> We may suppose that there are services implementing “action handlers”?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> It can listen on the DSE and execute the action.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l3 level1 lfo2">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><span style="mso-list:Ignore">5)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Nova tables to use<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Policy
</span><span lang="EN-US" style="font-family:"Courier New"">warning(id) :-</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Courier New""> nova:host(id, name, service, zone, memory_capacity),</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Courier New""> legacy:special_zone(zone),</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Courier New""> ceilometer:statistics(id, "memory", avg, count, duration,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:180.0pt"><span lang="EN-US" style="font-family:"Courier New""> durstart, durend, max, min, period,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:180.0pt;text-indent:36.0pt"><span lang="EN-US" style="font-family:"Courier New"">perstart, perend, sum, unit),</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-family:"Courier New""> avg > 0.75 * memory_capacity</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">I believe that ceilometer gives usage of VMs and not hosts. The host table (ComputeNode table) should give current
used capacity. <o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l3 level1 lfo2">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><span style="mso-list:Ignore">6)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">One of the issues highlighted in OpenStack (scheduler) and also elsewhere (e.g. Omega scheduler by google) is :<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Reading “host utilization” state from the data bases and DB (nova:host table) updates and overhead of maintaining
in-memory state uptodate.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:53.4pt;text-indent:-18.0pt;mso-list:l2 level1 lfo3">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:Wingdings;color:black"><span style="mso-list:Ignore">ð<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">This is expensive and current nova-scheduler does face this issue (many blogs/discussions).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> While the first goal is a PoC, this will likely become a concern in terms of adoption.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l3 level1 lfo2">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><span style="mso-list:Ignore">7)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">While in this document you have changed the “example” policy, could we drill down the set of policies for the PoC (the server under utilization
?)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:53.4pt;text-indent:-18.0pt;mso-list:l2 level1 lfo3">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:Wingdings;color:black"><span style="mso-list:Ignore">ð<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">As a reference
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Ruby<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">De :</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Yathiraj Udupi (</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">yudupi)
[mailto:yudupi@cisco.com] <br>
<b>Envoyé :</b> mardi 24 février 2015 20:01<br>
<b>À :</b> OpenStack Development Mailing List (not for usage questions); Tim Hinrichs<br>
<b>Cc :</b> Debo Dutta (dedutta)<br>
<b>Objet :</b> Re: [openstack-dev] [Congress][Delegation] Initial workflow design<o:p></o:p></span></p>
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<p class="MsoNormal"><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">Hi Tim, <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">Thanks for your updated doc on Delegation from Congress to a domain-specific policy engine, in this case, you are planning to build a LP-based VM-Placement engine
to be the domain specific policy engine. <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 agree your main goal is to first get the delegation interface sorted out. It will be good so that external services (like Solver-Scheduler) can also easily
integrate to the delegation model. <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">From the Solver-Scheduler point of view, we would actually want to start working on a PoC effort to start integrating Congress and the Solver-Scheduler. <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">We believe rather than pushing this effort to a long-term, it would add value to both the Solver Scheduler effort, as well as the Congress effort to try some
early integration now, as most of the LP solver work for VM placements is ready available now in Solver scheduler, and we need to spend some time thinking about translating your domain-agnostic policy to constraints that the Solver scheduler can use. <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">I would definitely need your help from the Congress interfaces and I hope you will share your early interfaces for the delegation, so I can start the effort from
the Solver scheduler side for integration. <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 will reach out to you to get some initial help for integration w.r.t. Congress, and also keep you posted about the progress from our side. <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">Thanks,<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">Yathi. <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"><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">On 2/23/15, 11:28 AM, "Tim Hinrichs" <<a href="mailto:thinrichs@vmware.com">thinrichs@vmware.com</a>> wrote:<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 style="background:white"><span style="font-family:"Calibri","sans-serif";color:black">Hi all,<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black">I made a heavy editing pass of the Delegation google doc, incorporating many of your comments and my latest investigations into VM-placement. I left the old stuff in place
at the end of the doc and put the new stuff at the top. <o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black">My goal was to propose an end-to-end workflow for a PoC that we could put together quickly to help us explore the delegation interface. We should iterate on this design
until we have something that we think is workable. And by all means pipe up if you think we need a totally different starting point to begin the iteration. <o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black">(BTW I'm thinking of the integration with solver-scheduler as a long-term solution to VM-placement, once we get the delegation interface sorted out.)<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black"><a href="https://docs.google.com/document/d/1ksDilJYXV-5AXWON8PLMedDKr9NpS8VbT0jIy_MIEtI/edit">https://docs.google.com/document/d/1ksDilJYXV-5AXWON8PLMedDKr9NpS8VbT0jIy_MIEtI/edit#</a><o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri","sans-serif";color:black">Tim<o:p></o:p></span></p>
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