rsync -rtuplg --stats --verbose --progress --modify-window=2 /
cygdrive/c/localfolder /cygdrive/z/backups/
...
...
The local and remote folders were already synchronized, that is why
0 files were transferred. File list generation did take only 3
minutes but the whole process took more than 1.5 hours to finish
and consumed a whopping 1.9 GB of downloaded bytes and 0.4 GB of
uploaded bytes as per network counters. For what? Zero files, Zero
bytes of file data.
I'm pretty sure this is because rsync has to copy all the files
locally to compare them to see if they need to be copied. Try
running the rsync as a service on the system that hosts the Z: drive
(or run rsync over ssh to the system that hosts the Z drive) and you
will see large performance improvement.
As far as I can see, rsync under cygwin is also too slow to be useful.
This has nothing to do with Cygwin or rsync. If you ran ROBOCOPY
under Windows using the same setup you would see the same performance
penalty.
Alfred
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