I'm trying to optimize some servers for "low latency" and
"low jitter". Do
you have a reasonable ideas about specific Samba options that might affect
those attributes?
In specific, I'm wondering about the "socket options". I would
think
"TCP_NODELAY" would be helpful in reducing latency.
However, I would also think that increasing the size of the SO_RCVBUF and
SO_SNDBUF would increase latency (because you would tend to fill up larger
buffers before writing incoming data to the filesystem, or you would delay
confirmation of writes going back out to the network).
What does the "jury of Samba experts" say about TCP_NODELAY and
SO_RCVBUF
and SO_SNDBUF these days? Most documents and default smb.conf files that come
with distributions have
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
Are these considered "magic numbers"?
I just loaded up the most recent SUSE distribution, SUSE 10, and ITS default
smb.conf file does not set any socket options at all.
Andy Liebman
