JavaThrottle

JavaThrottle is a pipe bandwidth limiting throttle, with a gui to change the throttle on the fly.

(0.6 shown here)

Features

Works via standard pipes.
Changing settings never interrupts the stream.
Shows the number of bytes sent and the current rate.
Shows a graph of traffic flow through the window (--graph).
Gives the ability to set the throttle to whatever you like whenever you like.
Includes a good set of command line flags so you can start it in whatever mode you like.
Throttle tries to be as smooth as possible at slow speeds and as efficient as possible at high speeds.
Tested on streams in excess of 100GB and spanning many days.

Version 0.6 - 2005-02-09 - Changelog

... | java -jar javathrottle.jar | ...

Use it to slow/pause programs by controlling how fast they can output data.
Use it with a tool like netcat to control network saturation.
Use it to show how many bytes have been sent through a pipe.
Set it to "unlimited" and show the rate of data through a pipe.
Throttle how much CPU or disk activity an IO-bound program can use (like archivers, makefiles, or SQL interpreters).
Imaginatively combine this program with others!

A graph in the window area of data sent.
This is 80% done; specify --graph on the command line.
Widgets and command line flags to adjust the incoming buffer size.
This is 50% done; widgets are there but no flags.
Make UI resizable.
I18n.

This program is distributed under the LGPL.

Here are some other projects that do similar things. Perhaps if JavaThrottle isn't what you are looking for you can find it here.

Updated: 2005-02-09