$VAR1 = {
	'host' => {
			 'batch' => {
					'run1' => {
							'jobs' => {
								 'Job name 1' => {
												 'duration' => '16',
												 'end' => '2011/07/01 23:50:36',
												 'start' => '2011/07/01 23:50:19'
											   },
								 'Job name 2' => {
												  'duration' => '22',
												  'end' => '2011/07/02 05:22:29',
												  'start' => '2011/07/02 05:22:06'
												},
									},
							'duration' => '25'
							'end' => '2011/07/02 05:22:29',
							'start' => '2011/07/02 05:22:06'
							},
							
					'run2' => {
							'jobs' => {
								 'Job name 1' => {
												 'duration' => '16',
												 'end' => '2011/07/01 23:50:36',
												 'start' => '2011/07/01 23:50:19'
											    },
								 'Job name 2' => {
												  'duration' => '22',
												  'end' => '2011/07/02 05:22:29',
												  'start' => '2011/07/02 05:22:06'
												},
									},
							'duration' => '25'
							'end' => '2011/07/02 05:22:29',
							'start' => '2011/07/02 05:22:06'		
							   },
					   },
				 },
		};			

##</code><code>##

%Hash -> $host -> $batch -> $run -> 'jobs' 	 -> $jobname -> 'duration'
								 -> 'duration'			 -> 'end'
								 -> 'start'				 -> 'start'
								 -> 'end'

##</code><code>##

foreach $host ( keys %hash )
{
	foreach $batch ( keys %{$hash{$host}} )
	{
		foreach $run ( keys %{$hash{$host}{$batch}} )
		{
			
			#print $hash{$host}{$batch}{$run}{'duration'}, "\n";
			print $hash{$host}{$batch}{$run}{'start'}, "\n";  #How do I sort by this?
			#print $hash{$host}{$batch}{$run}{'end'}, "\n";
			
			foreach $job ( keys %{$hash{$host}{$batch}{$run}{'jobs'} )
			{
				print $hash{$host}{$batch}{$run}{'jobs'}{$job}{'start'}, "\n"; #How do I sort by this?
			}
		}
	}
}