[clue-tech] Mirroring Debian testing, i386.

[Keith Hellman]

On Mon, Dec 24, 2007 at 12:58:56PM -0700, David L. Anselmi wrote:
> copies over new files--superior to the way cp/rcp work).  But in a 
> repository files don't change once there and I don't think rsync can figure 
> out that 90% of the blocks in foo_1.2_i386.deb are the same as those in 
> foo_1.1_i386.deb.  So its overhead for checking for changes is wasted.

This isn't my experience (I use rsync for all my backup scripts).
Granted, I probably don't do the volume of bits or inodes in a debian
repo.

If what you say is true, then the -I option to rsync doesn't make much
sense, and I wonder why it is provided:
 -I, --ignore-times
   Normally rsync will skip any files that are already the same size and
   have the same  modification time-stamp.   This option turns off this
   "quick check" behavior, causing all files to be updated.

Perhaps the slowdown is somewhere else, or perhaps the ftp mirroring
script is using --ignore-times?

Just my 2c.
 
-- 
Keith Hellman                             #include <disclaimer.h>
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khellman at mines.edu
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