RE: [Quickfix-users] TCP NO DELAY

[<em...@co...>]

I have added this as well, but this will not necessarily improve
performance. MSDN extract:

-------------------------------------------------
TCP_NODELAY 
The TCP_NODELAY option is specific to TCP/IP service providers. The Nagle
algorithm is disabled if the TCP_NODELAY option is enabled (and vice versa).
The process involves buffering send data when there is unacknowledged data
already in flight or buffering send data until a full-size packet can be
sent. It is highly recommended that TCP/IP service providers enable the
Nagle Algorithm by default, and for the vast majority of application
protocols the Nagle Algorithm can deliver significant performance
enhancements. However, for some applications this algorithm can impede
performance, and TCP_NODELAY can be used to turn it off. These are
applications where many small messages are sent, and the time delays between
the messages are maintained. Application writers should not set TCP_NODELAY
unless the impact of doing so is well-understood and desired because setting
TCP_NODELAY can have a significant negative impact on network and
application performance. 
-------------------------------------------------

Just make sure that you have added for the right reasons, and just because
it says that it will put data onto the wire immediately. This option can
cause a vast number of collisions and retransmissions on a very busy line.

Regards,


Emir

-----Original Message-----
From: que...@bn...
[mailto:que...@bn...]
Sent: Wednesday, December 15, 2004 10:36 AM
To: qui...@li...
Subject: [Quickfix-users] TCP NO DELAY


QuickFIX Documentation:
http://www.quickfixengine.org/quickfix/doc/html/index.html
QuickFIX FAQ: http://www.quickfixengine.org/wikifix/index.php?QuickFixFAQ
QuickFIX Support: http://www.quickfixengine.org/services.html


Hello all,

      To improve performances, I had to add the TCP_NODELAY socket option.

      What do yo think of addng a parameter tcp_nodelay in the config file
?

Regards,
Quentin.





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