Major Description
Provide a way to configure the frequency of Hive logging output, i.e., these:
2011-12-23 22:31:20,979 Stage-1 map = 16%, reduce = 0%, Cumulative CPU 567.27 sec
Some jobs update more than once per second, which is way more than necessary (and runs users out of scrollback buffer when using the CLI in screen).
Default should be to update when map % or reduce % complete has gone up by one, and should be configurable via "SET mapred.update.rate=N;" to indicate that I would like updates every N seconds.