Perhaps you are right,
In my case I have a following structure (All are dictionaries, and "varying game section" stats an Array, say, someone drops something X times during a game section, and i capture when (in seconds since game section start) each drop happened):
User-Groups->Users->UserGamePlayedDate-Time>TotalGameStats->GameSectionsStats->VaryingGameSectionStats
I need to analyze this data from various perspectives, such as improvements over time of individual users; average comparisons between user goups, etc. and graph it using charts (I am using the canvas chart plugin).
Programming everything individually with loops can be pretty tedious. I am hoping that a map reduce implementation will make the code shorter and simpler.
Dan