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...ld complete in appr. 150 seconds.) The system monitoring shows a 10-20% system cpu overhead and the HPL run takes more than 200 secs. After running "echo 3 > /proc/sys/vm/drop_caches" the system performance goes back to normal with a run time at 150 secs. I''ve created an infographic from our ganglia graphs for the above scenario. https://dl.dropboxusercontent.com/u/23468442/misc/lustre_bc_overhead.png Attached is an excerpt from perf top indicating that the kernel routine taking the most time is _spin_lock_irqsave if that means anything to anyone. Things tested: It does...

...ious with a strong attention to detail. - Ability to work under pressure in an international team setting. Preferred Qualifications: - Proficiency in the use of GIS software to annotate and publish maps - Proficiency in French - Data management skills in Excel and MySQL - Experience in generating infographics TO APPLY: External Applicants: Go to www.ifpri.org . Click on "Careers" and then click on "Research" to link you to Position # 11-166- Technical Writer, EPTD. Please complete on-line application, including a complete resume and a detailed letter of interest. Also complete sec...

...N8lV Other non-R-related stories in the past month included: the origin of the aphorism, "The plural of anecdote is not data" -- or is it? (http://bit.ly/lg7XuB); P-values, multiple comparisons, and jellybeans (http://bit.ly/imx1Q3); visualizing tax brackets (http://bit.ly/lLmQSc) and an infographic on how taxes are spent (http://bit.ly/knMqmw); browsing the San Andreas Fault (http://bit.ly/lMHumV); 250 years of Bayes' Theorem (http://bit.ly/leAHxd) and gardening with Gamma rays (http://bit.ly/lbvGNw). There are new R user groups (http://bit.ly/eC5YQe) in St Louis, MO (http://bit.ly/mrNvI...

...ths, violin plots, and improved annotations: http://bit.ly/wHYCbS A video demonstration of big-data Naive Bayes and Classification Tree models with Revolution R Enterprise for IBM Netezza: http://bit.ly/HylxcS A collection of two-minute video tutorials for R beginners: http://bit.ly/HylyO9 A bad infographic from Kony 2012 redrawn as a bar chart in R: http://bit.ly/HylxcT Sanjiv Das uses R to analyze when banks should modify distressed home loans, and which banks are still too big to fail: http://bit.ly/HylyO8 Step-by-step tutorials to get Hadoop running with R on Amazon EC2: http://bit.ly/Hylxd0 Ho...

...ther non-R-related stories in the past month included an analysis of Chatroulette (http://bit.ly/a4mkEL), the legality of statistical sampling (http://bit.ly/9mDfN9), teaching conditional probability (http://bit.ly/dusi61), and (on a lighter note) fonts and ink use (http://bit.ly/MSlPi) and vacuous infographics (http://bit.ly/aGhqhW). The R Community Calendar has also been updated at: http://blog.revolutionanalytics.com/calendar.html If you're looking for more articles about R, you can find summaries from previous months at http://blog.revolutionanalytics.com/roundups/. Join the REvolution mailing...

...bout 50% of R is written in C, while R packages on CRAN are about 50% R: http://bit.ly/pngg3S A new white paper by Norman Nie looks at the impact of statistical analysis methodology on working with Big Data: http://bit.ly/psdaTZ Other non-R-related stories in the past month included: a really bad infographic (http://bit.ly/mUDZm0 ), exploring abandoned metro tunnels (http://bit.ly/nkgDgH ), a stunning 360-degree view of space (http://bit.ly/p3cUk5 ) and parkour videos (http://bit.ly/njR0Ch ). There is a new R user group (http://bit.ly/eC5YQe ) at the University of Utah (http://bit.ly/oTo2xc ). Meeting...