I've tested several cases for cwRsync (3.0) on Win Server 2003. My scenario is have a rsync daemon on a source host with source files ~3GB total. And there're 50 dest servers running rsync command to sync file from source server at the same time. All servers are under same subnet and having gigabyte network adapter.
Test case 1:
This will do delta transfer, but the performance is really bad.
Number of files: 160 Number of files transferred: 49 Total file size: 2993222827 bytes = 2854 MB Total transferred file size: 1847285024 bytes =1761 MB Literal data: 69543644 bytes = 66 MB Matched data: 1777741380 bytes = 1695 MB File list size: 3088 File list generation time: 0.001 seconds File list transfer time: 0.000 seconds Total bytes sent: 1256178 Total bytes received: 70240527 = 67 MB sent 1256178 bytes received 70240527 bytes 182157.21 bytes/sec =
0.17 MB/s total size is 2993222827 speedup is 41.87
time elapsed: 385 sec
Test case 2:
Consuming more BW, ends up getting better performance.
Number of files: 160 Number of files transferred: 49 Total file size: 2993222827 bytes = 2855 MB Total transferred file size: 1847285024 bytes = 1762 MB Literal data: 1847285024 bytes = 1762 MB Matched data: 0 bytes File list size: 3088 File list generation time: 0.032 seconds File list transfer time: 0.000 seconds Total bytes sent: 1306 Total bytes received: 1847516035 sent 1306 bytes received 1847516035 bytes 8085415.06 bytes/sec 7.71 MB/s total size is 2993222827 speedup is 1.62 time elapsed: 228 sec
With this result. I may even want to zip up 3GB files into a 1GB zip file, and rsync smaller file to dest servers. Then unzip on dest servers.
Can the community give some suggestions on how to get the best performance from cwRsync? It seems like it doesn't take any advantage on delta-transfer or incremental copy at all.