#!/usr/bin/perl -w
use strict;
use Data::Dumper;

use GRID::Machine;
use GRID::Machine::Group qw{void};

my @MACHINE_NAMES = split /\s+/, $ENV{MACHINES};
my @m = map { GRID::Machine->new(host => $_) } @MACHINE_NAMES;

my $group = GRID::Machine::Group->new(cluster => \@m);

my @r = $group->sub(do_something =>  q{ `uname -a` });

my $r = $group->do_something( void() );

print Dumper($r);