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set the C<YERTL_FORMAT> environment variable to C<"json">.

=item L<pv (Pipe Viewer)|http://www.ivarch.com/programs/pv.shtml>

This tool helps examine how fast data is flowing through a shell
pipeline. If the size of the data is known, it can even provide
a progress bar and an ETA.

=item L<netcat (nc)|http://netcat.sourceforge.net>

Netcat allows simple streaming over a network. Using Netcat you can
start a Yertl pipeline on one machine and finish it on another machine.
For example, you could generate metrics on each client machine, and then
write them to a central machine to insert into a database on that
machine.

Netcat does not come with any security, so be careful (use firewalls).

=item L<socat|http://www.dest-unreach.org/socat/doc/socat.html>

Socat is a multi-purpose relay. It is similar to Netcat but with many