Dear Monks,

I've written a program that collects stats using system commands (SE Toolkit examples), re-formats the output, and sticks it into an RRD. However, it takes 10 seconds for each to run (since I'm collecting 5 second averages, & the first line of output is useless to me), and I don't want to wait 40 secs for each datapoint.

I'd like to run each of these commands in parallel, and I've looked at the Parallel:ForkManager module, but I don't think it applies since I want to run several different commands.

I also read about using the pipe function to get output back from a child process, but I need to do six at a time. I could just write 6 scipts, but that would mean an RRD for each script. Here's an example of what I'm running now (in serial):

sub Vmstat {
        $vmoutput_time = time;
        open (VMOUT, "$vmstat |");
        $vmoutput = <VMOUT>;
        close (VMOUT);
}

sub Cpustat {
        $cpuoutput_time = time;
        open (CPUOUT, "$cpustat |");
        @cpuoutput = <CPUOUT>;
        close (CPUOUT);
}

...

Vmstat ()
Cpustat ()

[download]
Is there a way to run multiple subroutines at once, and keep the output? Any assistance would be greatly appreciated.

In reply to Running Subroutines in Parallel by yid

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