[Pvfs2-developers] TCP socket buffer settings in configuration file

[Julian Martin Kunkel]

Hi,
enclosed you will find a patch adding the configuration flags:
TCPBufferSend and TCPBufferReceive to the default part of the configuration 
file.
I set the default values to receive = 65535 and send = 131071 which were used 
when no configuration options are set, 131071 is the max value (set by the 
kernel) on our machines. These values should be ok for Gbit ethernet. Also 
this does not change the tcp_window_size. 
In case the values are set smaller than the tcp window size the tcp flow 
control breaks. 
For better throughput on GBit Ethernet the default window size should be 
increased by the admin in /proc/sys/net/ipv4/tcp_wmem (and rmem).

Best regards,
Julian
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