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Thank you for the replies, and now I am aware of three different tools for parallel/distributed computing: 1. GNU Parallel (https://www.gnu.org/software/parallel/) - 'Works great for me. Easy to install. Easy to use. Given well-written programs, can be used to take advantage of all the cores on your computer. 2. Apache Hadoop (https://hadoop.apache.org) - 'Seems to be optimized for map/reduced computing, but can take advantage of many computers with many cores. 3. Apache Spark (http://spark.apache.org) - 'Seems to have learned lessons from Hadoop. 'Seems easier to install, and can also take advantage of many computers with many cores, but also comes with a few programming interfaces such as Python & Java. Also seems a bit easier to install than Hadoop. If I had one computer with 132 cores, then I'd probably stick with Parallel. If I had multiple computers with multiple cores, then I'd probably look more closely at Spark. Both Hadoop & Spark are "heavy" frameworks, compared to Parallel which is one Perl script. -- Eric Morgan