Re: [Brahms-dev-l] 10K problem

Hi all,

Ian Bearden <bearden@nbi.dk> wrote concerning
  Re: [Brahms-dev-l] 10K problem  [Thu, 29 Jan 2004 17:59:03 +0100] 
----------------------------------------------------------------------
> I have been looking through some of the calibrations scripts today, and 
> noticed this same thing...

I'd suggest that you change lines like 

   filename="${dir}/run00${runno}seq${seqno}.dat" 

to 

   filename=`printf %s/run%06dseq%03.dat ${dir} ${runno} ${seqno}`

(The shell command `printf' works like the C library function of the
same name - surprise, surprise :-)

In this way, you'll never have a problem like that (I don't suppose
that BRAHMS will ever take more than 1e6 runs - if that is not true,
increase the number of digits to 7 or 8).   

In ROOT scripts, you can use 

  Form("%s/run%06dseq%03d.dat", 
       dirOption.GetValue(), 
       runnoOption.GetValue(), 
       seqnoOption.GetValue())

or similar.  Again, if more than 1e6 runs is expected, then increase
the number of digits from 6 to 7 or 8. 

If you need to rename existing files, you can do a shell loop like 


   bash> for i in run*seq*.dat ; do \ 
      n=`echo  $i | sed -e 's/run//' -e '/seq*//'` ; \
      m=`echo  $i | sed -e 's/*segn//'` ; \
      o=`printf run%06dseq%03d.dat $n $m` ; \
      mv $i $o ; done

Notice that I'm assuming that you use a SH like shell e.g., BASH.  If
you're not, switch to a SH shell, by executing `/bin/sh' (most often a
symlink to `/bin/bash').

> yuck,

That's exactly why I say that Q'n'D most often means `Quirky and
Defunct' (though often meant as a catch phrase for `Quick and Dirty').  

I think I'll quote Ian on this: The 7 P's

  Proper prior preparation prevents piss-poor performance 

:-)
 
Yours,

 ___  |  Christian Holm Christensen 
  |_| |	 -------------------------------------------------------------
    | |	 Address: Sankt Hansgade 23, 1. th.  Phone:  (+45) 35 35 96 91
     _|	          DK-2200 Copenhagen N       Cell:   (+45) 24 61 85 91
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 ____|	 Email:   cholm@nbi.dk               Web:    www.nbi.dk/~cholm
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