FreeBSD bad file descriptor fix
Matthew P. Moffitt
moffitt.10 at osu.edu
Sun Dec 31 04:03:08 GMT 2000
I'm posting this for the benefit of others who've been asking about the socket set problems using TCP_NODELAY, etc with FreeBSD.
The fix turned out to be pretty simple, FreeBSD really just needed to have it's maxfiles/proc increased. For my environment I used:
sysctl -w kern.maxfiles=8092
sysctl -w kern.maxfilesperproc=8092
The serious problem was that I was getting miserable dos client writes to the server until I fixed this and changed the socket options to:
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_SNDBUF=4096 SO_RCVBUF=4096
I went from around 100kb/s to 3mb/s with this, network is 100mb/full.
This has caused a modest hit in Win95/NT client performance. I don't have real benchmarks on it as yet, it appears to be about 10%.
I was using FreeBSD 4.2 (STABLE) when I got it working, but I've run into this since samba 2.0.5 under FreeBSD 3.X.
I realize this isn't much detail, hopefully it will be something for others to work from if they run into it.
-Matt
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