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Iperf network performace. need to increase TCP window size

flixxx
in unRAID Server 4.4 [No new topics]

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Hi,

 

this question is more of a Windows 7 question then Unraid, but I'm hoping someone can help.

 

I was testing my gigabit lan with Iperf.

 

I made my unraid server as iperf -s (server)

 

and from my windows 7 i started testing.... I only got 350 mbit/s.

--------------------------------

Then I reversed it and the unraid server was iperf -c (Client).

 

My speeds jumped to 650 mbit/s.

 

 

After all that I went back to the original (Unraid acting as a server) and I was playing with the settings. I noticed if I changed the TCP Window size to 64 Kbytes on Windows 7, the speed jumped from 350 to 650 mbit/s.

 

So I looked around and I only found registry hack for Windows XP... What can I do to make my windows 7 send bigger packets? (By default iperf was sending approximately 32 kbytes)

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