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<p class="MsoNormal"><span lang="EN-US">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a (“normal”?) MIP optimization problem:<o:p></o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">1500 integer variables<o:p></o:p></span></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">1500 binary variables<o:p></o:p></span></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">1500 simple constraint between the integer and the binary variables.<o:p></o:p></span></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">50 (large) equations/constraints including all integer variables.<o:p></o:p></span></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">Objective function including all integer variables.<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have understood that it is possible to tune cbc?
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Using command line options, I assume.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Any tip on tuning to try out?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Currently, a solution is generated in 60 seconds with ratiogap 0.05. Due to repeated runs, reducing this time would be very good.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a Windows compiled cbc.exe from august 1<sup>st</sup> 2016. Probably version approx. 2.9.8, but cannot be sure on this<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="margin-left:-15.75pt;mso-list:l1 level1 lfo2"><span lang="EN-US">Bjorn<o:p></o:p></span></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
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