Thanks for your patient. It is really nice of the perl expets here to answer questions.

Yah, my platform is Linux. Some questions about nfreeze/ Storable

Here is a perl code to bring back the results to the main program. 
my $results_serialized = nfreeze \%testresults;
print $serialized;

[download]

1. What is the advantage of persistent data structure? all data in the same block of memory,fast speed? It is suitable for what kind of needs?
2. If not use nfreeze, I mean, just use 

return \%testresults

[download]
It is also working?

In reply to Re^4: parallel process on remote machines,read results and hanle timeout of those process by x12345
in thread parallel process on remote machines,read results and hanle timeout of those process by x12345

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