hadoop - Interface InputFormat vs Class InputFormat -
i newbie hadoop, trying learn , came across 2 versions of inputformat
.
org/apache/hadoop/mapred/inputformat
org/apache/hadoop/mapreduce/inputformat
the explanation of both apis seems same 1 interface , other class. can please me why there 2 apis same explanation in hadoop?
mapreduce has undergone complete overhaul in hadoop-0.23 , called mapreduce 2.0 (mrv2) or yarn.
org/apache/hadoop/mapred/inputformat refers hadoop mrv1
org/apache/hadoop/mapreduce/inputformat refers hadoop mrv2
both these libraries refer same functionality.
mrv2 rewrite of mrv1 compatibility of yarn architecture.
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