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The Thursday 2007-05-10 at 01:48 +0200, Carlos E. R. wrote:

> I expected the "real" time to be large, as I was doing other "heavy"
> things (a kdar backup that crashed), but the "user" time I expected to be

I found an interesting thing. I'm doing a test run of dar - after kdar 
crashed I saw the command line it uses and it is not so difficult - and I 
then told it to use "par". I thought it was going to use "par", but no, 
to me surprise it uses par2:

  ...
  Adding file to archive: /usr/share/susehelp/mecreating PAR file for file 
  /Grande/kdar/system_backup_10.2_20070509.2.dar ...
  par2cmdline version 0.4, Copyright (C) 2003 Peter Brian Clements.
  ...
  Block size: 585000
  Source file count: 1
  Source block count: 2000
  Redundancy: 2%
  Recovery block count: 40
  Recovery file count: 1




and it is the version I compiled, too. Curious!


The dar command is told to use par via the option:

  -B /usr/share/doc/packages/dar/dar_par.dcf

which runs that script at the end of each dar slice, I understand. It 
contains:

  # configuration file for dar to have Parchive integrated with DAR
  # to be passed to dar as argument of -B option
  # either directly on command line or throw $HOME/.darrc or /etc/darrc
  # files

  create:
          -E "/usr/share/doc/packages/dar/dar_par_create.duc %p %b %n %e %c 2"
  # 2 stands for 2% of redundancy
  # adjust it to your needs

  test:
          -R "/usr/share/doc/packages/dar/dar_par_test.duc %p %b %n %e %c"

  # note, that you may need to set the path to dar_par_test.duc
  # and dar_par_create.duc



So, for creation it calls 
"/usr/share/doc/packages/dar/dar_par_create.duc", which in turn contains 
this:

# change according to you need
PAR=par2


I did not touch that, it is dated "2006-11-25". Funny that SuSE contains a 
script calling a program they do not supply. Maybe I'll bug the bugzilla 
chaps a bit ;-)



(The par calling code is:

exec $PAR c -r$6 -n1 "$1/$2.$3.$4"

with the positional parameters being:

<path> <basename> <slice number> <extension> <context(not used)> <redundancy 
ratio (%)>


- -- 
Cheers,
       Carlos E. R.
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