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Re: TCP hangs up [message #38630 is a reply to message #38565]

Sat, 09 January 2010 01:27

SÃ©kiltoyai
Messages: 7
Registered: August 2009
Location: France

Junior Member

Hello,

Thanks for your answer.

Seems to be ok with your recommend. I have put tcpsndbuf to 48MB:64MB and i can send a 8GB file on my fastest connexion.

Here is the result in ubc :

240: 
kmemsize   2358102  3607954  20971520  31457280  0
...
tcpsndbuf  106952   9038280  50331648  67108864  0
...

So i think a barrier around 10MB will be suitable.

But i have two questions :
- Is it a normal behaviour that programs (or kernel network driver, i don't know where is the problem) hangs up in case of this tcp buffer shortage ? Isn't there a bug in the kernel, which should simply reject new send() system calls when its buffers are full ?
- Why a call to vzsplit (with a division in 6 vps) gives me a tcpsndbuf of approximately 5.8MB:11MB, so a barrier of 5.8MB, which is far below the needed barrier ?

[Updated on: Sat, 09 January 2010 01:29]

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[Message index]

		TCP hangs up By: SÃ©kiltoyai on Sat, 02 January 2010 23:08
		Re: TCP hangs up By: nuno on Fri, 08 January 2010 12:04
		Re: TCP hangs up By: SÃ©kiltoyai on Sat, 09 January 2010 01:27
		Re: TCP hangs up By: nuno on Sat, 09 January 2010 09:10
		Re: TCP hangs up By: SÃ©kiltoyai on Sun, 10 January 2010 17:43
		Re: TCP hangs up By: nuno on Sun, 10 January 2010 18:43
		Re: TCP hangs up By: SÃ©kiltoyai on Sun, 10 January 2010 19:00

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