After read this article I try to practice in other server that has gigabit ethernet card .

I have download opensuse 10.3 in Gnome and KDE version and use it as sample stuff for sending via scp.

sending before tuning :

monitor# scp openSUSE-10.3-GM-GNOME-i386.iso mother@172.88.1.3:/home/mother
Password:
openSUSE-10.3-GM-GNOME-i386.iso                                                             100%  665MB  10.2MB/s   01:05

ftp# sysctl kern.ipc.maxsockbuf=262144

ftp# sysctl net.inet.tcp.sendspace=65536

ftp# sysctl net.inet.tcp.recvspace=65536

ftp# sysctl net.inet.tcp.rfc1323=1

monitor# scp openSUSE-10.3-GM-GNOME-i386.iso mother@172.88.1.3:/home/mother
Password:
openSUSE-10.3-GM-GNOME-i386.iso                                                             100%  665MB  10.4MB/s   01:04

tuning the values in ‘mother’

====================================================
testing transfer data to ‘mother’

monitor# ls
openSUSE-10.3-GM-GNOME-i386.iso openSUSE-10.3-GM-KDE-i386.iso
monitor# scp openSUSE-10.3-GM-GNOME-i386.iso mother@172.88.1.3:/home/mother
Password:
openSUSE-10.3-GM-GNOME-i386.iso                                                             100%  665MB  10.4MB/s   01:04

====================================================

tuning the values to monitor
monitor# sysctl kern.ipc.maxsockbuf=262144
kern.ipc.maxsockbuf: 262144 -> 262144
monitor# sysctl net.inet.tcp.sendspace=65536
net.inet.tcp.sendspace: 32768 -> 65536
monitor# sysctl net.inet.tcp.recvspace=65536
net.inet.tcp.recvspace: 65536 -> 65536

testing again ::

monitor# scp openSUSE-10.3-GM-GNOME-i386.iso mother@172.88.1.3:/home/mother
Password:
openSUSE-10.3-GM-GNOME-i386.iso                                                             100%  665MB  10.2MB/s   01:05o

speed decrease? from 10.4 to 10.2  MB/s with same time.

when I try this

ftp# sysctl kern.ipc.nmbclusters=32768
kern.ipc.nmbclusters: 33792
sysctl: kern.ipc.nmbclusters: Invalid argument

Gee, I must read sysctl manual first before try again

• kern ipc maxsockbuf
• sysctl: kern ipc nmbclusters: invalid argument
• kern ipc nmbclusters
• sysctl kern ipc nmbclusters=
• kern ipc nmbclusters: invalid argument
• sysctl: kern ipc maxsockets: invalid argument
• sysctl kern ipc maxsockbuf
• kern ipc nmbclusters: 262144sysctl: kern ipc nmbclusters: Invalid argument
• sysctl ondemand
• nmbclusters
• kern ipc maxsockbuf sysctl
• sysctl nmbclusters
• sysctl kern ipc nmbclusters=262144
• sysctl -n kern ipc somaxconn opensuse
• sysctl -w kern ipc maxsockbuf
• sysctl -w kern ipc nmbclusters on bsd
• sysctl -w kern ipc somaxconn=32768
• ubuntu sysctl recvspace
• sysctl : opensus tuning
• sysctl freebsd
• sysctl kern
• tune kern ipc maxsockbuf
• sysctl: kern ipc nmbclusters invalid argument
• sysctl kern ipc maxsockets=
• sysctl maxsockbuf
• suse maxsockbuf
• sendfile Invalid argument bsd
• freebsd 100 mb/s sysctl
• kern ipc maxsockbuf freebsd
• ipcs: read error: invalid argument
• gm ipc world - home
• ftp sysctl
• freebsd sysctl: kern ipc nmbclusters: invalid argument
• freebsd sysctl speed ftp
• freebsd sysctl kern ipc maxsockets
• kern ipc maxsockets: invalid argument
• kern ipc nmbclusters invalid argument
• scp failed with sysctl
• perl net::scp suse 10 3
• ondemand recvspace
• nmbclusters freebsd sysctl
• net inet tcp sendspace nmbclusters
• monitor tcpsendspace
• maxsockbuf freebsd
• maxsockbuf
• freebsd kern ipc maxsockets decrease