[Coin-discuss] Trouble Capturing Sbb output with Linux redirect

[John J Forrest]

Steven,

I would think a cleaner approach would be to override the standard message 
handler to do exactly what you want.  I would start with Clp as part of 
the unit test overrides the message handler.  Look in Clp/Test at 
MyMessageHandler.?pp and its use in unitTest.cpp.

John Forrest



steven.henderson at us.army.mil 
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02/20/2004 08:26 AM
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[Coin-discuss] Trouble Capturing Sbb output with Linux redirect






Folks,
 
I am writing a web interface for COIN, specifically for Clp and Sbb.
I want to capture output from these, especially from Sbb.  The idea
being folks could "check progress" as the model runs.

My first attempt was to pause Sbb every x nodes, use methods 
to get best solution and current objective, write these to a database, 
then restart.  Is it possible to restart sbb after it times out or reaches
node/solution count?
 
My next thought was to just dump all Sbb output to a file, then read and
display the output as it runs.  However, I am having major problems
getting output.   When I run my application in the backgroud, the
output file is empty until Sbb terminates.
 
My app that invokes Sbb is wcSbb.
 
I invoke the process as follows:
 
nohup /COIN/webCOIN/wcSbb > /COIN/webCOIN/outfiles/myoutfile &
 
The process goes to background, but output file is empty until Sbb 
terminates.
I am on a Redhat box (9.0)

I get the same thing if I try:

/COIN/webCOIN/wcSbb > /COIN/webCOIN/outfiles/myoutfile 
 
I apologize if this turns out to be some linux setting.  I just thought 
maybe 
someone else had encountered it as well.
 
Thank you,
 
Steve Henderson
 
 

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