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Written by Chad
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Friday, 21 May 2010 |
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So this is the first I've done anything with parallel dev in a rather long time. This week I did some hacking to get a multithreaded version of a Pi estimator done using the Monte Carlo method. Of course it is a rather trivial program/example to use, and its almost always the first thing that books on HPC have you try. But I did it in a very weird (pronounced poorly) implemented manner and had fun with it. I will post that some time later. JPPF was something I found when looking for ways to do parallel with Java. I know BSU started a project and actually was looking for that. So today Brian and I spent the time and effort to install and explore it a bit. And in not much time at all (30-40 minutes?) we had an actual cluster running some sample programs they provided. Our main limitation was the lack of a "30 second setup and trial" document and getting Ant installed and running on our laptops. After that it was rather straight forward. I'm very impressed with the administration tool and how much detail it gives about everything. I will try to get this installed on my networked computers at home this weekend and maybe re-write the monte carlo program for the cluster to give it a try. A cluster of computers in a coffee shop! A BEOWULF cluster... how cool.
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Written by Chad
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Monday, 29 March 2010 |
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Need to store some information on the clients machine somehow and you used to use browser cookies? Check out Flex/Flash SharedObject. Should work as desired. |
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Written by Chad
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Monday, 15 March 2010 |
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Need to do some funky math on the fly and don't want to struggle through conversions between units etc? Google's search engine also has a calculator built into it. I am not sure why but I am always working through how long a file transfer time will be or would be etc. Scenario: You have a 28 megabyte file and you know the outbound connection is capped at 92 kilobits per second (about .75 megabits) and you want to know how long the file transfer should take. Just enter "28 MB over 92 KBps in seconds" into Google search and there you have it in seconds. You can also change it to be minutes if you want, or hours or days (or any other time unit, try out centuries for some fun.) Hints: you MUST keep your initial units straight or the time will be wrong. 28 MB is different than 28 Mb! So if in doubt, resist using abbreviations. (MB is megabyte and Mb is megabit, at least according to Google). Enjoy!
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Last Updated ( Monday, 15 March 2010 )
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