Hello, What's the DistributedCache for, in words? I'm combing through the JobClient/JobTracker/TaskTracker code right now and slowly getting a view of the whole system, starting from "bin/hadoop jar ...". I've almost made it down the stack to TaskRunner, where DistributedCache seems to get used most heavily, and started looking at DistributedCache.java but things are a bit less penetrable than the rest of the codebase (including the first single-letter variable name I've seen, other than "r" for Random()). Any wise Hadoop dev care to clear it up a bit for me?
Thanks, Jeff
