Hello perl experts,

I would like to learn to do the following things with perl:
--open parallel process on a lot of remote machines,
--get back the result,
--and kill the process which cannot succeed.

I already have the scripts from another person to do this function, but I don't undertand well, so I am here.

The senario is:
--There are 1000 linux machines, on each machine there is already a shell script used to check the machine's memory, disk.. etc.
--A perl script on a server uses 'open pipe', it opens 1000 filehandel to go to each machine, runs the shell script and brings back the results. The shell script normally needs just 5-15s to finish, so I can get back the results soon. But sometimes teh shell script can be stucked because of the problem on the machine(eg, if disk problem, df command will stay there for ages), in this case, I should close the filehandle after waiting for some times eg,300s

My two main questions are:

1.In the script I have, it sets all the filehandels to non_blocking and use 'sysread' to read the output. Why use non-blocking? What about use while (<FH>) {push @results,$_;}. What is the difference?

2.How to do the timeout for the filehandle?

Thanks in advance!

In reply to parallel process on remote machines,read results and hanle timeout of those process by x12345

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