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Great thanks for the update Ted!</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Ted Ralphs <ted@lehigh.edu><br>
<b>Sent:</b> 12 November 2019 21:39<br>
<b>To:</b> Naladimmu Sreelakshmi <naladimmu.sreelakshmi@fractal.ai><br>
<b>Cc:</b> JP Fasano <jpfasano@gmail.com>; cbc <cbc@list.coin-or.org><br>
<b>Subject:</b> Re: [External] Re: [Cbc] 2.10 version on Ubuntu</font>
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<div dir="ltr">This seems to be fixed now.
<div><br>
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<div>Ted</div>
</div>
<br>
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<div dir="ltr" class="x_gmail_attr">On Mon, Nov 11, 2019 at 9:31 AM Ted Ralphs <<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a>> wrote:<br>
</div>
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<div dir="ltr">Yes, I'm aware and will have a solution soon. For now, you can add --skip='ThirdParty/Metis' to the coinbrew command line and it should work.
<div><br>
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<div>Ted</div>
</div>
<br>
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<div dir="ltr" class="x_gmail_attr">On Mon, Nov 11, 2019 at 2:43 AM Naladimmu Sreelakshmi <<a href="mailto:naladimmu.sreelakshmi@fractal.ai" target="_blank">naladimmu.sreelakshmi@fractal.ai</a>> wrote:<br>
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Hi Ted,</div>
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<br>
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The installation is now failing because fetch for Metis is failing - the link for the download is not working. Is this temporary or there is an alternate link? These are the commands I used.</div>
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<div style="margin:0px; background-color:white">wget <a href="https://raw.githubusercontent.com/coin-or/coinbrew/master/coinbrew" target="_blank">
https://raw.githubusercontent.com/coin-or/coinbrew/master/coinbrew</a><br>
</div>
<div style="margin:0px; background-color:white">chmod +x coinbrew<br>
</div>
<div style="margin:0px; background-color:white">./coinbrew fetch Cbc:releases/2.10.3 --no-prompt<br>
</div>
<div style="margin:0px; background-color:white">./coinbrew build Cbc --no-prompt --prefix=/usr/local --enable-cbc-parallel<br>
</div>
<span style="margin:0px; background-color:white">sudo ./coinbrew install Cbc</span><br>
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<a href="http://glaros.dtc.umn.edu/gkhome/fetch/sw/metis/OLD/metis-4.0.3.tar.gz" target="_blank">http://glaros.dtc.umn.edu/gkhome/fetch/sw/metis/OLD/metis-4.0.3.tar.gz</a><br>
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<font face="Calibri,sans-serif" size="2"><span style="font-size:11pt"><font face="Arial,sans-serif" size="2" color="#757B80"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif; color:rgb(0,0,0)">Thanks,</span></font></span></font></div>
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Sree</div>
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<font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Naladimmu Sreelakshmi <<a href="mailto:naladimmu.sreelakshmi@fractal.ai" target="_blank">naladimmu.sreelakshmi@fractal.ai</a>><br>
<b>Sent:</b> 19 September 2019 14:06<br>
<b>To:</b> Ted Ralphs <<a href="mailto:ted@lehigh.edu" target="_blank">ted@lehigh.edu</a>><br>
<b>Cc:</b> JP Fasano <<a href="mailto:jpfasano@gmail.com" target="_blank">jpfasano@gmail.com</a>>; cbc <<a href="mailto:cbc@list.coin-or.org" target="_blank">cbc@list.coin-or.org</a>><br>
<b>Subject:</b> Re: [External] Re: [Cbc] 2.10 version on Ubuntu</font>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Understood! 100+n gives me same result on every iteration.</div>
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The difference in performance is not too drastic too, it takes 26 minutes for a problem of ~43,000 variables with 116 threads as against 24 minutes when threads is just 16.</div>
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<font face="Calibri,sans-serif" size="2"><span style="font-size:11pt"><font face="Arial,sans-serif" size="2" color="#757B80"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif; color:rgb(0,0,0)">Thanks</span></font></span></font></div>
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<font face="Calibri,sans-serif" size="2"><span style="font-size:11pt"><font face="Arial,sans-serif" size="2" color="#757B80"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif; color:rgb(0,0,0)">Sree</span></font></span></font></div>
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<font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Ted Ralphs <<a href="mailto:ted@lehigh.edu" target="_blank">ted@lehigh.edu</a>><br>
<b>Sent:</b> 19 September 2019 00:18<br>
<b>To:</b> Naladimmu Sreelakshmi <<a href="mailto:naladimmu.sreelakshmi@fractal.ai" target="_blank">naladimmu.sreelakshmi@fractal.ai</a>><br>
<b>Cc:</b> JP Fasano <<a href="mailto:jpfasano@gmail.com" target="_blank">jpfasano@gmail.com</a>>; cbc <<a href="mailto:cbc@list.coin-or.org" target="_blank">cbc@list.coin-or.org</a>><br>
<b>Subject:</b> Re: [External] Re: [Cbc] 2.10 version on Ubuntu</font>
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<div>
<div dir="ltr">The parallelism is non-deterministic by default. Determinism makes the parallelism a little less efficient, so non-determinism is usually preferred unless there is a reason it's unacceptable. To get deterministic parallel, you need to set the
number of threads to 100+n, e.g., 104. I know, it's weird and not well-documented :).
<div><br>
</div>
<div>I just installed the Ubuntu package and it behaves the same way. I get nondeterminism if I set the threads to something < 100.<br>
<div><br>
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<div>Ted</div>
</div>
</div>
<br>
<div>
<div dir="ltr">On Wed, Sep 18, 2019 at 12:28 PM Naladimmu Sreelakshmi <<a href="mailto:naladimmu.sreelakshmi@fractal.ai" target="_blank">naladimmu.sreelakshmi@fractal.ai</a>> wrote:<br>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Hi Ted,</div>
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<br>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
While running using multiple threads (compiled using enable-cbc-parallel), have noticed that the result changes slightly on repetitions. Have not observed this if I were to use the binary files instead. </div>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Want to understand why the convergence changes while using multiple threads.</div>
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<br>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I am using below options while running cbc:</div>
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<span>opt.options['threads']=1<br>
</span>
<div>opt.options['randomC']=1234567 <br>
</div>
<div>opt.options['randomS']=1234567<br>
</div>
<span>opt.options['ratio']=0.004 </span><br>
</div>
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<font face="Calibri,sans-serif" size="2"><span style="font-size:11pt"><font face="Arial,sans-serif" size="2" color="#757B80"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif; color:rgb(0,0,0)">Thanks,</span></font></span></font></div>
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<font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Ted Ralphs <<a href="mailto:ted@lehigh.edu" target="_blank">ted@lehigh.edu</a>><br>
<b>Sent:</b> 15 September 2019 21:46<br>
<b>To:</b> JP Fasano <<a href="mailto:jpfasano@gmail.com" target="_blank">jpfasano@gmail.com</a>><br>
<b>Cc:</b> Naladimmu Sreelakshmi <<a href="mailto:naladimmu.sreelakshmi@fractal.ai" target="_blank">naladimmu.sreelakshmi@fractal.ai</a>>; cbc <<a href="mailto:cbc@list.coin-or.org" target="_blank">cbc@list.coin-or.org</a>><br>
<b>Subject:</b> Re: [External] Re: [Cbc] 2.10 version on Ubuntu</font>
<div> </div>
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<div>
<div dir="ltr">Yes, the uninstall should be done as sudo if the installation directory is not writable by the user. I now added a check and it will automatically prompt you for a sudo password if you forget to run it as sudo and this is needed. The same is
actually true for the install, so there is technically no need to run anything as sudo.
<div><br>
</div>
<div>I've detected a few more bugs for some uncommon edge cases, so better do an update. I hope it will be stable soon and then I will start making releases and do enhancements in separate feature branches so it's not such a moving target.</div>
<div><br>
</div>
<div>Cheers,</div>
<div><br>
</div>
<div>Ted</div>
</div>
<br>
<div>
<div dir="ltr">On Sun, Sep 15, 2019 at 7:04 AM JP Fasano <<a href="mailto:jpfasano@gmail.com" target="_blank">jpfasano@gmail.com</a>> wrote:<br>
</div>
<blockquote style="margin:0px 0px 0px 0.8ex; border-left:1px solid rgb(204,204,204); padding-left:1ex">
<div dir="ltr">Ted,
<div>Should the uninstall be done with sudo?</div>
<blockquote style="margin:0px 0px 0px 40px; border:none; padding:0px">
<div><font face="monospace"><b>sudo</b> ./coinbrew Cbc uninstall </font></div>
</blockquote>
<div>If uninstall only removes the local files in the <font face="monospace">build</font> directory, then leaving out sudo should be OK,</div>
<div>but I suspect uninstall also removes the files in /usr/local which should require sudo.</div>
<div><br>
</div>
<div>Thank you for doing all this work.</div>
<div>It is really helpful and appreciated.</div>
<div><br>
</div>
<div>JP</div>
</div>
<br>
<div>
<div dir="ltr">On Sat, Sep 14, 2019 at 10:43 PM Ted Ralphs <<a href="mailto:ted@lehigh.edu" target="_blank">ted@lehigh.edu</a>> wrote:<br>
</div>
<blockquote style="margin:0px 0px 0px 0.8ex; border-left:1px solid rgb(204,204,204); padding-left:1ex">
<div dir="ltr">OK, it took a little digging, but I got everything fixed up and added a few more enhancements to coinbrew in the meantime. The errors similar to
<div><span style="font-family:monospace"><br>
</span></div>
<div><span style="font-family:monospace">rm: cannot remove '/usr/local/share/coin/Data/</span><span style="font-family:monospace">miplib3/harp2': Permission denied</span></div>
<div><span style="font-family:monospace"><br>
</span></div>
during the build step were due to an embarassing bug that has now been fixed. The build should not need to be be run with sudo by design---that is the reason for separating the build and install steps.
<div><br>
</div>
<div>As for the install, I was able to replicate what you saw. As far as I can tell, you most likely did successfully in installing the release version (despite Cbc's version message), but when Cbc was built, it seems to have pulled in the configuration header
file from the previously installed master version and the wrong version string got injected into the code. I'm still verifying this, but in any case, it was almost certainly some sort of corruption due to the previous install. </div>
<div><br>
</div>
<div>This possibility never occurred to me, so thanks once again for the detailed reports! I have an idea how to fix it, but it may take a little work. </div>
<div><br>
</div>
<div>In general, it's best to uninstall one version before starting to build and install another. Just run</div>
<div><br>
</div>
<div>./coinbrew Cbc uninstall</div>
<div><br>
</div>
<div>With what I think happened, you should actually now be able to simply re-build and re-install Cbc itself (no need to rebuild the dependencies) and it will be fixed. I add the option now to rebuild a project, so you should in principle be able to do</div>
<div><br>
</div>
<div>./coinbrew build --rebuild Cbc --skip-dependencies</div>
<div><br>
</div>
<div>and it will rebuild. However, since I also just changed that way build configurations are cached (sorry for the moving target), I would actually suggest that you reconfigure and rebuild everything with</div>
<div><br>
</div>
<div>
<div>./coinbrew build --rebuild --reconfigure Cbc --prefix=/usr/local</div>
</div>
<div><br>
</div>
<div>Alternatively, you can also just remove the build directory altogether with "rm -rf build". After you rebuild, you can install again and everything should be fixed up.</div>
<div><br>
</div>
<div>Cheers,</div>
<div><br>
</div>
<div>Ted</div>
<div> </div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
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<br>
<div>
<div dir="ltr">On Fri, Sep 13, 2019 at 9:07 PM JP Fasano <<a href="mailto:jpfasano@gmail.com" target="_blank">jpfasano@gmail.com</a>> wrote:<br>
</div>
<blockquote style="margin:0px 0px 0px 0.8ex; border-left:1px solid rgb(204,204,204); padding-left:1ex">
<div dir="ltr">
<div dir="ltr">I tried a fresh checkout of the latest released code and the build seemed to work, but didn't.
<div>I did:</div>
<div>
<ul>
<span style="color:rgb(80,0,80)">
<li style="margin-left:15px"><font face="monospace">wget <a href="https://raw.githubusercontent.com/coin-or/coinbrew/master/coinbrew" target="_blank">https://raw.githubusercontent.com/coin-or/coinbrew/master/coinbrew</a> </font></li><li style="margin-left:15px"><font face="monospace">chmod +x coinbrew</font></li></span>
<li style="margin-left:15px"><font face="monospace">./coinbrew fetch Cbc:releases/2.10.3 --no-prompt >fetchConsole.log 2>&1</font></li><li style="margin-left:15px"><font face="monospace">./coinbrew build Cbc --no-prompt --prefix=/usr/local >buildConsole.log 2>&1</font></li><li style="margin-left:15px"><font face="monospace">sudo ./coinbrew install Cbc >installConsole.log 2>&1</font></li></ul>
</div>
<div>When I run cbc, I see</div>
<blockquote style="margin:0px 0px 0px 40px; border:none; padding:0px">
<div><font face="monospace">jpfasano@WitOpenSource:~/coinCbc$ cbc</font></div>
<div><font face="monospace">Welcome to the CBC MILP Solver</font></div>
<div><font face="monospace">Version: Trunk (unstable)</font></div>
<div><font face="monospace">Build Date: Sep 13 2019</font></div>
<div><font face="monospace"><br>
</font></div>
<div><font face="monospace">CoinSolver takes input from arguments ( - switches to stdin)</font></div>
<div><font face="monospace">Enter ? for list of commands or help</font></div>
<div><font face="monospace">Coin:</font></div>
</blockquote>
<div>Notice that the version is Trunk (unstable).</div>
<div>So the released version of cbc didn't get installed.</div>
<div><br>
</div>
<div>The last lines of the buildConsole.log look suspicious:</div>
</div>
<blockquote style="margin:0px 0px 0px 40px; border:none; padding:0px">
<div dir="ltr">
<div><font face="monospace">jpfasano@WitOpenSource:~/coinCbc$ tail buildConsole.log</font></div>
</div>
</blockquote>
<div dir="ltr">
<blockquote style="margin:0px 0px 0px 40px; border:none; padding:0px">
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/harp2': Permission denied</font></div>
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/vpm1': Permission denied</font></div>
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/set1ch': Permission denied</font></div>
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/qnet1_o': Permission denied</font></div>
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/pk1': Permission denied</font></div>
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/misc03': Permission denied</font></div>
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/fixnet6': Permission denied</font></div>
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/gen': Permission denied</font></div>
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/mitre': Permission denied</font></div>
<div><font face="monospace">rm: cannot remove '/usr/local/share/coin/Data/miplib3/rout': Permission denied</font></div>
</blockquote>
<div>Perhaps "<font face="monospace">./coinbrew build"</font> needs to be run with sudo?</div>
<div><br>
</div>
<div>Here are links to the console logs:</div>
<div>
<ul>
<li style="margin-left:15px">fetch: <a href="https://1drv.ms/u/s!ArBmlTcrk72FoL1xP8WgHK50ARsLTQ?e=OEkV7M" target="_blank">link</a></li><li style="margin-left:15px">build: <a href="https://1drv.ms/u/s!ArBmlTcrk72FoL1ynKuLKJWe9Vzldw?e=cYyXr5" target="_blank">link</a></li><li style="margin-left:15px">install: <a href="https://1drv.ms/u/s!ArBmlTcrk72FoL1wM48QUYfsbZNDRg?e=hU2jkV" target="_blank">link</a></li></ul>
</div>
</div>
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-- <br>
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<div dir="ltr">
<div>
<div dir="ltr">Dr. Ted Ralphs<br>
Professor, Industrial and Systems Engineering<br>
Lehigh University<br>
(610) 628-1280<br>
ted 'at' lehigh 'dot' edu<br>
<a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
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-- <br>
<div dir="ltr">
<div dir="ltr">
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<div dir="ltr">
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<div dir="ltr">
<div>
<div dir="ltr">Dr. Ted Ralphs<br>
Professor, Industrial and Systems Engineering<br>
Lehigh University<br>
(610) 628-1280<br>
ted 'at' lehigh 'dot' edu<br>
<a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
</div>
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<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">Dr. Ted Ralphs<br>
Professor, Industrial and Systems Engineering<br>
Lehigh University<br>
(610) 628-1280<br>
ted 'at' lehigh 'dot' edu<br>
<a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
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<div dir="ltr">
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">Dr. Ted Ralphs<br>
Professor, Industrial and Systems Engineering<br>
Lehigh University<br>
(610) 628-1280<br>
ted 'at' lehigh 'dot' edu<br>
<a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
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-- <br>
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<div dir="ltr">
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<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">Dr. Ted Ralphs<br>
Professor, Industrial and Systems Engineering<br>
Lehigh University<br>
(610) 628-1280<br>
ted 'at' lehigh 'dot' edu<br>
<a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
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