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On 06/11/13 15:42, Tom wrote: > Why bother with a cluster - just cross compile on something else - > a modern multicore can do the whole of an ubuntu distribution in a > day or two. Tom te tom te tom Agreed. This is an exercise in pointlessness. Apart from the perfectly valid reasons of A: it's fun and B: because you can, there are otherwise no good reasons for clustering RPis full-stop: they are profoundly weak in raw processing power and have pathetic networking for internode communication, which will kill any cluster's effectiveness. A single high-end graphics card, let alone an Intel Phi co-processor or actual GPGPU compute board will utterly destroy any amount of clustered RPis for any embarrassingly parallel task, be it raytracing or my common usage, oclhashcat. RPis are for fun, hobby stuff and things like home-brewed robotics projects and other cool little hacks. They are categorically NOT for doing anything computationally intensive. Yet another 'solution' in search of a problem... Regards -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq