[Cbc] Feature Request: calling Heuristics after every cut iteration

[John Forrest]

Haroldo,

setWhereFrom(63) would call every node and more so for example running
misc07 taking 8054 nodes shouldHeurRun for the rounding heuristic was
called 
Flag     times
   0         1
   1        99
   2         1
   3      4029
   4      8256
so if setWhereFrom(16) it would have been called 8256 times

The main exception is if mini branch and bound is being used when
heuristics are not done inside that (you can see if message Cbc0041
issued mentioning complete fathoming).

The testing is done in shouldHeurRun which is virtual and so you can
override in your heuristic and find out more about the CbcModel.

John Forrest
On Thu, 2010-05-20 at 22:05 -0300, Haroldo Santos wrote:
> Can I have more control on how often heuristics are called ?
> The indicated command
>     setWhereFrom(63)
> adopts which strategy ? (every k nodes ... ? )
> 
> Haroldo
> 
> On Thu, Apr 8, 2010 at 8:21 AM, John Forrest
> <john.forrest at fastercoin.com> wrote:
> > For each heuristic that you want to try frequently
> >
> > setWhereFrom(63);
> >
> >
> > John Forrest
> >
> >
> > On Thu, 2010-04-08 at 11:43 +0200, Thomas Schoenemann wrote:
> >> Dear CBC-developers,
> >>
> >> I am in a situation where deriving cuts (and solving the arsing LPs)
> >> takes a lot of time, but deriving integral solutions is quite cheap. I
> >> would hence like to generate integer solutions after _every_ cut round.
> >> I think this would be a useful feature for quite a number of users. Do
> >> you think it could be integrated (as an option)?
> >>
> >> Best regards,
> >>   Thomas
> >>
> >> _______________________________________________
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> >>
> >
> >
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> >
> 
> 
>