[Coin-discuss] Osi Defaults - Mps Reader / Writer

[Matthew Saltzman]

I'll add my vote for this also, as the correct fix for the current code.

The handler idea (or something like it) is intriguing for the future,
though.  It seems like a useful facility to allow the user to write his
own I/O library, maybe pulling data from a custom-format file or a SQL
database, for example.  I know the user can always hack directly, but is
there a mechanism to smooth the way a bit?


On Wed, 28 May 2003, Leonardo B Lopes wrote:

> I second this exactly.
>
> Alan King wrote:
> >
> > I'm leaning toward Matt's option 3 (allow user to choose  Xxx versus
> > COIN mps r/w) but with the default being COIN.  That way the standard is
> > imposed for normal usage, and users with specific mps Xxx issues can do
> > their thing too.
> >
> > Alan
> >
> > Alan King
> > Mathematical Sciences, IBM Research
> > http://www.research.ibm.com/
> > http://www.research.ibm.com/people/k/kingaj/
> >
> > University Relations: University of Washington
> > http://www.washington.edu
> > http://www.ibm.com/university
> >
> >
> > 	*Lou Hafer <lou at cs.sfu.ca>*
> > Sent by: coin-discuss-admin at www-124.ibm.com
> >
> > 05/27/2003 12:13 PM
> > Please respond to coin-discuss
> >
> >
> >         To:        coin-discuss at oss.software.ibm.com
> >         cc:
> >         Subject:        Re: [Coin-discuss] Osi Defaults - Mps Reader /
> > Writer
> >
> >
> >
> >
> >
> >                 I adopted option 2 for OsiDylp: it now uses CoinMpsI0
> > for both read
> > and write,  to take advantage of the compressed read/write capability. I
> > think we should specify this as the default --- it's the best match with the
> > ideal of a common solver interface. For those folks who are using the
> > rest of
> > the COIN-OR infrastructure, but don't intend to play with multiple solvers,
> > perhaps we could treat the read and write MPS routines as handlers, and
> > provide a pair of interface routines that would allow the client to replace
> > them with specialised routines (something akin to passInMessageHandler).
> >
> >
> >                              Lou
> >
> >
> >
> > _______________________________________________
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> > Coin-discuss at www-124.ibm.com
> > http://www-124.ibm.com/developerworks/oss/mailman/listinfo/coin-discuss
> >
>
>

-- 
		Matthew Saltzman

Clemson University Math Sciences
mjs at clemson.edu
http://www.math.clemson.edu/~mjs