In partnership with Berkeley, Twitter employees are giving a number of lectures to a class on big data. I did one on Pig. I thought some might find it useful.
Slides: http://db.tt/VJfy1Ixz Full presentation: http://blogs.ischool.berkeley.edu/i290-abdt-s12/ If you have any comments let me know (though I'll be out of the country for the next two weeks). Hope it's useful Jon
