Network Traffic

This page records network traffic in TCM. It currently works only if you are on the University network. This may improve in the future.

For the University network, see the pages here, and these direct links to primary JANet connection and secondary JANet connection, primary TCM connection and secondary TCM connection.

Note that the graphs are of rates averaged over five minute intervals. Note that the TCM graphs below use a "log" scale on the y axis.

Link to CUDN

Green: incoming traffic. Blue: outgoing traffic.

/rscratch and
/usr/local/shared

Green: reads. Blue: writes.

Home Directory Server

Green: reads. Blue: writes.

Hydra, mostly
Web Server

Green: data served. Blue: data received.

(Dark green and purple show five-minute peak rates on graphs other than daily.)

Raw data

For the raw data, including weekly and monthly graphs, and individual room sockets, follow this link.

Method

Hardware counters record total traffic volume on each switch port. These are read every five minutes. Transfer rates have little meaning without averaging over a time period, for a single packet will always be emitted at the line speed of around 125MB/s. The counters record the overhead of TCP and ethernet headers.