What is the maximum number of TCP connections I can have in Windows Server 2008?

Posted by evilfred on Server Fault See other posts from Server Fault or by evilfred
Published on 2010-08-26T23:29:31Z Indexed on 2011/11/19 17:57 UTC
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windows-server-2008

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tcpip

I would like to have as many connections (single connections from many different clients) as humanly possible in a server running on Windows Server 2008, in order to support a Comet-style application. The application is written in C#. The connections will not be chatty, they just need to be open (and stay open). Buying boatloads of memory and fast CPUs are not a problem.

As far as I can tell, I will be limited to 65k simultaneous open connections per NIC - the maximum number of ports. Is this accurate? Or can I go beyond 65k connections / NIC somehow? It seems like there are server products for Linux at least that support hundreds of thousands of connections. How do they do this?

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