Cullen, I enjoy seeing you on this list.
Happy New Year! Henry -----Original Message----- From: Cullen Jennings [mailto:[EMAIL PROTECTED] Sent: Monday, December 31, 2007 6:12 PM To: theory and practice of decentralized computer networks Subject: Re: [p2p-hackers] maximum number of tcp conntections on linux One of the better descriptions I found of ways to deal with this is http://kegel.com/c10k.html On Dec 28, 2007, at 1:55 PM, Alex Pankratov wrote: > > > From: [EMAIL PROTECTED] [mailto:p2p-hackers- > [EMAIL PROTECTED] On Behalf Of Syzygy Dc > Sent: Friday, December 28, 2007 12:31 PM > To: theory and practice of decentralized computer networks > Subject: [p2p-hackers] maximum number of tcp conntections on linux > > Hi, > > I am trying to setup a TCP server on Linux server which could get > requests from millions of clients. What is the maximum number of > simultaneous TCP clients which can be connected to a TCP server > running on Linux? I searched on google and came across using sysctl > to specify max number of file descriptors. Has anyone used it and > can share their experience? > Linux network stack scales really well. I have personally used it > for handling upwards of 100K TCP sessions in ESTABLISHED state and > it wasn't showing any signs of stress. Some of the variables in / > proc/sys/fs and /proc/sys/net/ipv4 do in fact need to be tuned, but > it's all pretty straight forward if you know how TCP works. > Additionally the userland code needs to built around epoll, in > which case it will also scale well. > > In case of "millions of clients" your first and foremost headache > will probably be the kernel memory usage; quickly followed by CPU > exhaustion (that's assuming at least some activity on this 1 mil of > connections). > > All in all, the kernel-level IO processing is not that big of a > deal. It all really comes down the amount of state data that the > setup requires (including tx/rx buffer space) and what your app > does with the data. > > Alex > > > _______________________________________________ > p2p-hackers mailing list > p2p-hackers@lists.zooko.com > http://lists.zooko.com/mailman/listinfo/p2p-hackers _______________________________________________ p2p-hackers mailing list p2p-hackers@lists.zooko.com http://lists.zooko.com/mailman/listinfo/p2p-hackers _______________________________________________ p2p-hackers mailing list p2p-hackers@lists.zooko.com http://lists.zooko.com/mailman/listinfo/p2p-hackers
