Network statistic tool

[vtpaulson]

Guys,

Is there any tool which gives network performance statistics in bytes. Most of the common tools gives the information in packets in and out. I need to find out the network bandwidth in my server..

Any kind of info is appreciated...

Thanks in advance

Paulson

[Carsten Krege · Accepted solution]

Try netperf on http://www.netperf.org.

Carsten

[eran maor]

Hi

i will also use glance to view nfs stat and lan stat .

also you can use the lanadmin to see error on the network .

[Carsten Krege]

Took some time to find it in my archive, but this is a very nice method to measure the performance of networks and I found it useful for the folks who like to stress their networks :)

# mknod /dev/zero c 3 0x000003
# ftp remote
Connected to remote
220 remote FTP server (Version 1.7.212.1 Thu May 9 21:09:19 GMT 1996) ready.
Name (remote:root): root
331 Password required for root.
Password:
230 User root logged in.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> put "| dd if=/dev/zero bs=8192 count=1000" /dev/null
200 PORT command successful.
150 Opening BINARY mode data connection for /dev/null.
1000+0 records in
1000+0 records out
226 Transfer complete.
8192000 bytes sent in 9.54 seconds (838.36 Kbytes/s)
ftp>


/dev/zero provides a stream of zeroes (call it the opposite of /dev/null). The advantage is that no disk I/O is involved and you do not have any overhead from reading data, which would introduce some uncertainties if any bottleneck might be introduced by I/O problems.

This should also work with spray(1m), but I never used this.

Carsten