hello, all,
As a newbie, I have been used to the (k1,v1,k2,v2) format
parameter list for map and reduce methods in mapper and reducer(as is
written in many books), but after several failures, I found in 0.20+, if we
extends from base class org.apache.hadoop.mapreduce.Mapper, the map should
be something like this:
void map(KEYIN key, VALUEIN value, Context context) throws
IOException, InterruptedException
A little confusing to me.
My question is why the old fashion map interface deprecated?
thanks!
--
best wishes.
steven
