massive tcp servers
Fri Jun 25 08:10:38 CEST 2004
On Jun 24, 2004, at 2:34, Luke Gorrie wrote:
> Oh, oh, oh, that sounds like fun!
Yeah, I think this project is a really stupid idea, but it's a
fascinating problem. :)
> I'm assuming that most of these users will be idle most of the time,
> and each will use a small amount of overall bandwidth.
> Entering fantasy land here..
> My first thought is that the OS will have trouble with that many
> connections. I'm not certain of the per-connection overhead, but
> looking at the 'tcp_opt' struct in include/linux/tcp.h at least it
> looks significant.
Yep, (although I was thinking about using FreeBSD or something). Does
erlang use /dev/poll?
> If you wrote your own TCP (or simpler custom protocol) in userspace
> then maybe you could pull it off with just one box. You could keep the
> TCP control structures in a database on disk and map the active ones
> into a large-but-bounded-size pool in memory.
That is just completely amazing. It seems like the obvious and likely
only solution to the problem. You've given me a lot to think about.
Thanks a lot.
SPY My girlfriend asked me which one I like better.
pub 1024/3CAE01D5 1994/11/03 Dustin Sallings <>
| Key fingerprint = 87 02 57 08 02 D0 DA D6 C8 0F 3E 65 51 98 D8 BE
L_______________________ I hope the answer won't upset her. ____________
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