rsync vs. rcp

[James Knowles]

> when dealing with 1GB+ files, rsync is 
> 4-5 _times_ slower than rcp.

What OS?

I'm downloading cygwin (slow) to see if I can compile a Windows rsync that 
doesn't show this nasty behaviour.

I just did a test on about 3.5GB total, Linux -> Linux. I got 11 minutes vs. 
9 minutes on , which for bulk transport shows scp a tad faster, but 
certainly not 4-5x. [When the >1GB files are sparsely altered, then it 
becomes no contest with rsync. :-)]

For bulk transport:

$ /usr/bin/time rsync -essh -aSPv vmware/devel foomachine:/u1/scratch
building file list ...
7 files to consider
devel/
devel/hdrive.vmdk
   1219973632 100%    5.16MB/s    0:00:00
devel/win2000.cfg
         2012 100%    0.00kB/s    0:00:00
devel/win2000.log
        39502 100%   31.25MB/s    0:00:00
devel/win2000.nvram
         8648 100%    0.00kB/s    0:00:00
devel/win2000.vmdk
   2094334464 100%    5.10MB/s    0:00:00
devel/win2000.vmss
    277378961 100%    5.07MB/s    0:00:00
devel/
wrote 3592176100 bytes  read 116 bytes  5357458.94 bytes/sec
total size is 3591737219  speedup is 1.00
114.23user 71.49system 11:10.09elapsed 27%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (961major+510minor)pagefaults 0swaps
$ ssh foomachine 'rm -rf /u1/scratch/*'
$ /usr/bin/time scp -pr vmware/devel/ foomachine:/u1/scratch
win2000.nvram        100% 
|*******************************************************************|  8648 
       00:00
hdrive.vmdk          100% 
|*******************************************************************|  1163 
MB    02:59
win2000.cfg          100% 
|*******************************************************************|  2012 
       00:00
win2000.log          100% 
|*******************************************************************| 39502 
       00:00
win2000.vmdk         100% 
|*******************************************************************|  1997 
MB    05:10
win2000.vmss         100% 
|*******************************************************************|   264 
MB    00:41
0.29user 26.15system 8:52.43elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (218major+40minor)pagefaults 0swaps



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