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Re: Re: Introduction to Parallel::ForkManager

by biosysadmin (Deacon)
on Sep 15, 2003 at 05:38 UTC ( #291490=note: print w/ replies, xml ) Need Help??

in reply to Re: Introduction to Parallel::ForkManager
in thread Introduction to Parallel::ForkManager

You are correct, I have used the module just as described in the referenced node. I'm planning on writing up a synopsis of what I had to do, how I did it, and how it all works and stick it under craft.

However, since you asked here's a short answer. I did use Parallel::ForkManager to solve my problem, I followed the following suggestions from the thread:

  • I uncompressed each file to a temporary location (not /tmp) and then deleted it after the reformatting was through.
  • I made sure that the temporary location was on a different physical drive from the permanent location for the formatted files.
  • I rewrote my program to divide the work into 4 distinct sets, and then forked a process for each set.
  • I switched to the GNU version of gzip because of this reply (the GNU version is supposedly faster).
  • I staggered the initiation of the threads by sleeping for 60 seconds to try and avoid competition for disk I/O.
There's a bit more about the optimization that I've done, but look for it under Craft in the next few weeks.

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