More than 1M open file descriptors

From: John Masinter
Date: Wed May 19 2010 - 11:01:01 EST

I'm a software engineer and work with a fortune-500 company. We have a
line of linux-powered network security appliances and I am responsible
for Linux / OS development.
Our multi-core appliance handles a large number of low-bandwith tcp
connections, and after years of performance streamlining, we have hit
the kernel's million tcp connection limit.
Is there a kernel hack to increase the file descriptor limit beyond 1M
to that we may have more than 1M open tcp connections? If this is
discussed elsewhere, please point me in the right direction. Many
thanks to everyone that contributes to open source.
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