TrafficLimits is a plugin for the Deluge bittorrent client. It will pause all torrents if more than a set amount of data is uploaded or downloaded.
TrafficLimits can be found at http://github.com/mavit/deluge-trafficlimits.
Downloads can be found at https://www.mavit.org.uk/deluge-trafficlimits/.
Questions may be asked on the Deluge forum.
As well as setting the limits through the preferences (GTK UI only, for now), you can also create a file called ~/.config/deluge/trafficlimits containing a label, the upload limit, the download limit, and the combined limit (in bytes), each on a line by themselves. For example:
January
-1
21474836480
-1
This is intended to be used by a cron job for automatic scheduling, e.g.,
* 00-15,21-23 * * * /bin/echo -e "Unlimited\n-1\n-1\n-1" > ${XDG_CONFIG_HOME:-~/.config}/deluge/trafficlimits.tmp && mv ${XDG_CONFIG_HOME:-~/.config}/deluge/trafficlimits.tmp ${XDG_CONFIG_HOME:-~/.config}/deluge/trafficlimits
* 16-20 * * * /bin/echo -e "Evening\n400000000\n750000000\n-1" > ${XDG_CONFIG_HOME:-~/.config}/deluge/trafficlimits.tmp && mv ${XDG_CONFIG_HOME:-~/.config}/deluge/trafficlimits.tmp ${XDG_CONFIG_HOME:-~/.config}/deluge/trafficlimits
Please see also the Toggle plugin. You will need this to resume transfers once they have been paused, unless you use the automatic scheduling..