Re: st: RE: Will Stata/MP speed up running multiple dofiles in batch mode?

[Steven Samuels <sjsamuels@gmail.com>]

--
I can't answer your questions, Alex, but the web reference for batch  
jobs with Stata OS X (GUI) is: http://www.stata.com/support/faqs/mac/advanced8.html 
.  Your reference refers to Stata for Unix, but some details are  
different.

Steve

On Jan 19, 2011, at 7:32 PM, Alex Eapen wrote:

Hi all,

I would appreciate some advice on whether Stata/MP will be helpful in  
the following situation:

I currently have Stata/SE 10.1 for Mac. I would like to run several do- 
files at once (rather than sequentially). I see that this can be done  
by running Stata in batch mode from, say, the Terminal application in  
Mac OS (see http://www.stata.com/support/faqs/unix/batch.html). That  
is, at the prompt in the Terminal application in a Mac OS, I type:

statase -b do bigjob1.do &

followed by....
statase -b do bigjob2.do &

and then...
statase -b do bigjob3.do &

And all three dofiles run simultaneously.
1. My first question is whether there is a limit on how many do files  
can be run simultaneously in this manner?
2. I compared the time it takes to execute a single dofile alone to  
when it is run simultaneously with the other two. (I ensured all three  
dofiles contain exactly the same code, so any difference in time-to- 
run is not because of different commands in them). When the three  
dofiles are running simultaneously, possibly because stata resources  
on my computer are being stretched across three dofiles, each one  
takes longer to complete. Will Stata/MP help in this situation? Will  
Stata/MP distribute the execution of dofiles (or parts of them) across  
multiple cores and thus reduce the time it takes for each to complete?
Thanks in advance.
Warm regards,
Alex

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