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I'm not sure if this is an issue, or configuration problem, or just the way it is but I am doing a large transfer of files between data centres, Washington DC -> Salt Lake City, around 14TB total, average file size is about 80mb.

Each file seems to average at around 600 KB/s, but i can transfer 10 at a time multi threaded and each will do around the same speed.

But if i open another instance of my FTP client (Filezilla) and do the same with that, I can transfer another 10 at the same speed, I have done this with 4 clients all transferring different files giving me a total speed of around 22+ MB/s.

Why can't individual files transfer any faster than 600 KB/s, i clearly have the bandwidth and speed to do this.

I am using Filezilla server at the receiving end, there are no speed limits set on the client or server.

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Are there any routers or firewalls between the machines? –  Lucas Kauffman Jul 27 '12 at 11:19
    
im sure there are many switches / routers in the datacenters, I don't have any details of these. These are 2 dedicated servers I rent. –  Paul Hinett Jul 27 '12 at 12:07
1  
it might be they are throttling you at 600 KB/s per connection –  Lucas Kauffman Jul 27 '12 at 12:24
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