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    <p>Perhaps not the answer you were looking for, but - this is one of those situations where an alternative is sooo much better that it's hard to ignore. </p> <p>The cost of AWS clusters is <em>ridiculously low</em> (my emphasis) for exactly these types of computing problems. You pay only for what you use. I can guarantee you that you will save money (at the very least in opportunity costs) by not spending the time trying to convert 12 windows machines into a cluster. For your purposes, you could probably even do this for free. (IIRC, they still offer free computing time on clusters)</p> <p>References: </p> <ul> <li><a href="https://stackoverflow.com/questions/7241244/using-aws-for-parallel-processing-with-r">Using AWS for parallel processing with R</a></li> <li><a href="http://blog.revolutionanalytics.com/2011/01/run-r-in-parallel-on-a-hadoop-cluster-with-aws-in-15-minutes.html" rel="nofollow noreferrer">http://blog.revolutionanalytics.com/2011/01/run-r-in-parallel-on-a-hadoop-cluster-with-aws-in-15-minutes.html</a></li> <li><a href="http://code.google.com/p/segue/" rel="nofollow noreferrer">http://code.google.com/p/segue/</a></li> <li><a href="http://www.vcasmo.com/video/drewconway/8468" rel="nofollow noreferrer">http://www.vcasmo.com/video/drewconway/8468</a></li> <li><a href="http://aws.amazon.com/ec2/instance-types/" rel="nofollow noreferrer">http://aws.amazon.com/ec2/instance-types/</a></li> <li><a href="http://aws.amazon.com/ec2/pricing/" rel="nofollow noreferrer">http://aws.amazon.com/ec2/pricing/</a></li> </ul> <p>Some of these instances are so powerful you probably wouldn't even need to figure out how to setup your work on a cluster (given your current description). As you can see from the references costs are ridiculously low, ranging from 1-4$ per hour of compute time.</p>
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    1. POCreate a cluster of co-workers' Windows 7 PCs for parallel processing in R?
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    1. USBrandon Bertelsen
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    1. COWow - hadn't even thought about the cloud. Okay - I'll give this a shot. At the kind of price points that you're talking about it would indeed be interesting.
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      1. USThomas Browne
    2. COHaving thought about this, because a large part of my work involves paramaterizing the function and re-running it, it is quite possible to do 5 hours of work a day on this even in a big could based parallel installation. Let's say $2.50 per hour = $12.50 per day, 20 days per month, we're talking $250 per month. I wouldn't describe it as "ridiculously" low though I guess if I'm getting tons of computer power for it will indeed be cost effective.
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      1. USThomas Browne
 

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