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8.6

rsync under cygwin too slow

Asked by vinod in rSync Backup Utility, CYGWIN

Tags: rsync cygwin

I am using rsync under bash/cygwin on my laptop to backup Documents folder from laptop at home to my desktop in my office, both running Vista+SP1. From laptop, I VPN to my office over broadband, map shared folder at desktop as network drive Z on my laptop. The command used is:

rsync -rtuplg --stats --verbose --progress --modify-window=2 /cygdrive/c/Users/vinod/Documents /cygdrive/z/backups/

The backups are working but process is much too slow. As you may see from the statistics given below, the transfer rate was more than 100 times slower than the available bandwidth. I had only one new file on the laptop, only 43 KB in size. The folder has about 700 other files totalling about 120 MB in size.  The statistics shows it took only 0.358 seconds to generate+transfer file list, but actually it took more than 300 seconds. I know there are overheads due to VPN, File sharing, cygwin etc. which could account for a factor 3x or so, but 100x no way. What am I doing wrong?

Post rsync statistics:

Number of files: 723
Number of files transferred: 1
Total file size: 120133912 bytes
Total transferred file size: 43008 bytes
Literal data: 43008 bytes
Matched data: 0 byes
File list size: 19913
File list generation time: 0.358 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 67295
Total bytes received: 4350

sent 67295 bytes  received 4350 bytes 232.24 bytes/sec
total size is 120133912  speedup is 1676.79

 
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[+][-]04/21/09 10:31 PM, ID: 24201601Accepted Solution

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Zones: rSync Backup Utility, CYGWIN
Tags: rsync cygwin
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Solution Provided By: bdb112
Participating Experts: 4
Solution Grade: A
 
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