Archive for December, 2012

Built two new cluster nodes from scratch

Monday, December 10th, 2012

Test-case nodes from newegg, using to benchmark and figure out what nodes will be cheapest in both the short and long term, price/performance-wise. We’ve run into a bit of a snafu with pmap giving slowdowns compared to map on AMD hardware, and disappointing gains on Intel hardware. Anyway, the nodes themselves came out well, except that one of the cases came with a bad power supply (Oh well, don’t feel like RMA’ing it, since I have some extras around. I also ordered a couple of spare power supplies, since they seem to keep dying. I also threw away all of my bad ones.) compute-1-17 is an Intel Core i7 3770K with 16GB of RAM. Total node cost, including case: $607.86
compute-1-18 is an AMD FX-8350 with 16GB of RAM. Total node cost, including case: $489.96. I used hard drives I had around, so I should probably add $80 or so to those costs for a hard drive. The Core i7 node happens to be WAY faster with clojure and pmap, due to some clojure or Java oddness that we have yet to understand. However, the FX-8350 is actually faster than the i7 on single-threaded clojure maps. Odder and odder, since all the available benchmarks out there say the opposite of that in both cases. Now to benchmark rendering!