[Dirvish] freedups

Keith Lofstrom keithl at kl-ic.com
Sat Mar 5 14:20:13 PST 2005

This intriguing note was added to the wiki page VaultBranch by
"Anonymous Gnome":

Comment: dirvish and rsync are not smart enough to know that
filesystems in different branches are similar, but freedups is:
http://www.stearns.org/freedups/ . If you have many duplicate files on
different hosts that are backed up to the same volume (not necessarily
even the same vault), you can save a lot of disk space by running
freedups after dirvish.  Example:

freedups.pl --actuallylink --minsize 512     \
            --cachefile=$bank/freedups.cache \
            --maxfiles=400 $bank

This looks useful.  The quality of the software is unknown, and it
could use some documentation (limited to a README and the option 
--usage).  I will make a dd copy of a backup drive and see if this
works over the next few days.  


Keith Lofstrom          keithl at keithl.com         Voice (503)-520-1993
KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon"
Design Contracting in Bipolar and CMOS - Analog, Digital, and Scan ICs

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