Tony Pearson wrote a bunch of stuff about Watson. https://www.ibm.com/developerworks/mydeveloperworks/blogs/InsideSystemStorage/entry/ibm_watson_how_to_build_yo

Tony Pearson wrote a bunch of stuff about Watson. https://www.ibm.com/developerworks/mydeveloperworks/blogs/InsideSystemStorage/entry/ibm_watson_how_to_build_your_own_watson_jr_in_your_basement7?lang=en https://www.ibm.com/developerworks/mydeveloperworks/blogs/In... Had a bunch of details including some performance details... Single core -- 1 -- 2 hours Single IBM Power750 server -- 32 -- < 4 minutes Single rack (10 servers) -- 320 -- < 30 seconds IBM Watson (90 servers) -- 2,880 -- < 3 seconds https://www.ibm.com/developerworks/mydeveloperworks/blogs/InsideSystemStorage/entry/watson_what_is_the_smartest_machine_on_earth7?lang=en https://www.ibm.com/developerworks/mydeveloperworks/blogs/In... Had details on the data/storage/ram: When Watson is booted up, the 15TB of total RAM are loaded up, and thereafter the DeepQA processing is all done from memory. According to IBM Research, "The actual size of the data (analyzed and indexed text, knowledge bases, etc.) used for candidate answer generation and evidence evaluation is under 1TB." For performance reasons, various subsets of the data are replicated in RAM on different functional groups of cluster nodes. The entire system is self-contained, Watson is NOT going to the internet searching for answers.