Alexis Gallagher schrieb:
I am finding that rsync+ssh is giving extremely slow file transfers. But
this slowdown is hitting not when it needs to send data over the
network, but when it applies the rsync algorithm which is supposed to be
faster than sending all the data over the network. This is very puzzling.
For a benchmark, I tried transfering a 5.4 MB mp3 file three different
ways. Here were my results, as reported by 'scp -v' and 'rsync
--progress --stats':
scp: 311000 B/s
rsync (file not there): 309000 B/s
rsync (file already there): 741 B/s
When the file is alredy there, rsync reports a speedup of about 70.
(When the file is not already there, the speed up is 1, of course.) I am
running rsync over ssh with pre-generated keys installed in my .ssh
directories.
This is a binary MP3.
rsync (as diff) is not good in checking binary diffs.
Please try it with a typical text file, where the patch
is smaller than the source.
--
Reini Urban
http://xarch.tu-graz.ac.at/home/rurban/
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