#12004: copying a linear program using Coin solver consumes enormous amounts of
memory
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Reporter: john_perry | Owner: ncohen
Type: defect | Status: needs_info
Priority: major | Milestone: sage-4.8
Component: linear programming | Keywords: linear programming, Coin,
copy, memory
Work_issues: | Upstream: Reported upstream.
Developers acknowledge bug.
Reviewer: | Author: john_perry
Merged: | Dependencies:
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Comment(by john_perry):
Replying to [comment:22 ncohen]:
> Well.... The main reason is that if I make no mistake Clp is their
*linear* solver and Cbc their *integer* solver. So if we switch to
OsiClpSolverInterface I guess we immediately loose the ability to solve
integer programs `O_o` Nathann
This was a question I had in mind, by the way. Doesn't MILP return float()
answers? In fact, I've often found it to return non-integer answers, so
that in some of my code, I've had to hack a way to create approximate
rational answers (which will suffice for my purposes).
I understand your problem, and I'll ask with them. One option that would
work for me would be to create a separate Clp interface, and work with
that. I guess that in this case, we couldn't package it with Coin.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12004#comment:23>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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