[  
ID:        123
Start:     /tmp/file.1  /tmp/file.2  /tmp/file.3
Done:      /complete/success.1 /complete/success.2
]

[  
ID:        456
Start:     /complete/success.1  /complete/success.2  /tmp/file.3
Done:      /complete/success.3  /complete/success.4
]
... etc

##</code><code>##

        $hash{123}{Start} => /tmp/file.1  
                          => /tmp/file.2  
                          => /tmp/file.3
        $hash{123}{End}   => /complete/success.1
                          => /complete/success.2