Re^2: Performance of FTP Transfer

If your connection is saturated while transferring one file for 10 minutes, how would you transfer more by adding more threads? If your network is the bottleneck, adding more threads will not help. If your disk is the bottleneck, more threads will not help. If you are transferring from multiple remote hosts, and each one only can fill 1/3 of your network pipe, then 3 threads may help.

If you try to add more traffic to an already saturated resource, the effort of managing that saturation will actually decrease your performance (see thrash (computer science) or ask an old networking person what happened to 10Mb ethernet that was operating at about 30% utilization).

--MidLifeXis

The tomes, scrolls etc are dusty because they reside in a dusty old house, not because they're unused. --hangon in this post

Comment on Re^2: Performance of FTP Transfer

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Re^3: Performance of FTP Transfer by jrsimmon (Hermit) on Jul 22, 2009 at 15:33 UTC
If the network connection is indeed saturated, then there is little (though not nothing) to be gained by multi-threading the transfer of large files. It is not very common, though, for the network to be a bottleneck.	[reply]