UbuntuHelp:UbuntuLTSP/MeasuringTrafficNtop

文章出处:

https://help.ubuntu.com/community/UbuntuLTSP/MeasuringTrafficNtop

点击翻译:

English

请不要直接编辑翻译本页，本页将定期与来源同步。

This page is specific to Ubuntu Alternate/Edubuntu DVD versions 9.10

If you find this information applicable to additional versions/releases, please edit this page and modify this header to reflect that. Please also include any necessary modifications for this information to apply to the additional versions.

---

Measuring network traffic with Ntop

Alkis Georgopoulos pointed out in #ltsp channel how to do some maths for network traffic. The formula for movies, when xv is used, is: width x height x 12 bit/sec x fps Do your math :) I.e. an 640x400@25 movie needs about 50 Mbps independed of the screen resolution (the scaling happens on the client). A DVD needs about 125 Mbps. Barely viewable with a 100 mbps client. http://www.nubae.com/logs/ltsp20091104_pg2.html

---

Install Ntop program in both sides, in server and in chroot. Follow this basic setup for both cases. https://help.ubuntu.com/community/Ntop After that you can open web page (http://ip-number:3000) in server and in chroot for thin client. Here are examples. Ntop in server (192.168.1.112) side (Edubuntu DVD 9.10 AMD64 on KVM machine).

admin-edubuntu@edubuntu:~$ ps ax | grep ntop
 1092 ?        Ssl    1:21 /usr/sbin/ntop -d -L -u ntop -P /var/lib/ntop --access-log-file /var/log/ntop/access.log -i eth0 -p /etc/ntop/protocol.list -O /var/log/ntop

Ntop on chroot (192.168.1.206) side (thin client is HP Mini 2133, using firefox/flash as a local apps).

root@ltsp206:~# ps ax | grep ntop
 2196 ?        Ssl    1:01 /usr/sbin/ntop -d -L -u ntop -P /var/lib/ntop --access-log-file /var/log/ntop/access.log -i eth0 -p /etc/ntop/protocol.list -O /var/log/ntop

---