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Hi Pang,<br>
<br>
what do you mean exactly with "sometimes the process may be killed"?<br>
<br>
In general, SCIP does not provide the possibility to restart from a
saved state. The only exception is reoptimization but this feature
has to be enable before solving the problem. Reoptimization
automatically collects information like open and pruned nodes.
However, this does not work if the solving process got killed. SCIP
has to terminate in a proper state, e.g., if the gap limit has been
reached.<br>
<br>
Best,<br>
Jakob<br>
<br>
<div class="moz-cite-prefix">Am 11.07.19 um 11:04 schrieb 庞琳卓:<br>
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<blockquote type="cite"
cite="mid:CAGR2Pvfq6JmvMOAYcB-jCvnUcEr3dvOAa5sYwjySDJnQNuHBXg@mail.gmail.com">
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<div class="gmail_default">Hi, I'm using SCIP to solve a
sequence of problems, sometimes the process may be killed
due to some reasons, all the information is lost. So i want
to save as much information as possible during the solving
process so that I can utilize the information in the process
of solving a new problem(only objective function changes)
when the process is killed.</div>
<div class="gmail_default"> I have tried to save all the
feasible solutions so that i can add them to the solution
storage before solving a new problem, however, since the
problem is hard, i also want to save open nodes(or the
important nodes) and nodes with greater bounds than the
global upper bounds, and solve from these nodes in the next
process.</div>
<div class="gmail_default">I know that I can have access to
open nodes through <span
style="color:rgb(36,39,41);font-family:Arial,"Helvetica
Neue",Helvetica,sans-serif;font-size:15px">SCIPgetsiblings()
& </span><span
style="color:rgb(36,39,41);font-family:Arial,"Helvetica
Neue",Helvetica,sans-serif;font-size:15px">SCIPgetLeaves()& </span>SCIPgetchildren(),
I wonder that if i have saved the open nodes, and launch a
new process, how can i solve from the nodes?</div>
<div class="gmail_default">Thank you very much!</div>
<div class="gmail_default" style="font-size:small"><font
size="4">Best wishes,</font></div>
</div>
<div><br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
Scip mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Scip@zib.de">Scip@zib.de</a>
<a class="moz-txt-link-freetext" href="https://listserv.zib.de/mailman/listinfo/scip">https://listserv.zib.de/mailman/listinfo/scip</a>
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<br>
<pre class="moz-signature" cols="72">--
Jakob Witzig
Zuse Institute Berlin (ZIB)
Division Mathematical Optimization and Scientific Information
Research Group Mathematical Optimization Methods
Takustrasse 7
14195 Berlin
Tel. : +49 (0)30 84185-416
Fax : +49 (0)30 84185-269
email: <a class="moz-txt-link-abbreviated" href="mailto:witzig@zib.de">witzig@zib.de</a></pre>
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