Pull from github:

git clone git://github.com/fabiokung/clustered-jruby.git

Long time waiting, because terracotta-2.7.1 (vanilla) and jruby-complete (patched) are bundled.

Change to the project directory:

cd clustered-jruby

Build it:

mvn install

(although mvn package is enough)

Change to the jmaglev demo directory:

cd jmaglev

Start the terracotta server:

lib/terracotta-2.7.1/bin/start-tc-server.sh

Open another two terminals

Run the simplified jirb inside them:

cd clustered-jruby/jmaglev
./bin/jmaglev jmaglev.rb

Follow the demo. You will be able to share global variables among all jmaglevs:

require 'hat'
$hat
require 'rabbit'
$hat.put(Rabbit.new)

in the other terminal, try to see the magic hat contents:

$hat