Re: Opening 5000 file descriptors in linux??

Stephen C. Tweedie (sct@redhat.com)
Thu, 1 Apr 1999 01:28:40 +0100 (BST)


Hi,

On Tue, 30 Mar 1999 16:00:55 +0200, Gerold Jury <gjury@grips.com> said:

> The only problem i have now is, i cannot open more than aproximately
> 1000 sockets even with the Alan Series. (and fiddling with echo xxx >
> /proc/...)

Two things: first of all, the default rlimit for open files is still
1024, so you need to raise that to use more in one process. From bash,
that's

ulimit -Hn 100000; ulimit -n 100000

or use the setrlimit() kernel call.

Secondly, the default FD_SET type only has space for 1024 fds in the
bitmap, so either make sure you are using poll, or define your own,
sufficiently large, FD_SET if you need to use select.

Other than that, all should work.

--Stephen

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