What Is A “map” In Hadoop?

1.	What Is A “map” In Hadoop?
Answer» In Hadoop, a map is a phase in HDFS query solving. A map READS data from an INPUT location, and OUTPUTS a KEY value PAIR according to the input type. In Hadoop, a map is a phase in HDFS query solving. A map reads data from an input location, and outputs a key value pair according to the input type.

Answer»

In Hadoop, a map is a phase in HDFS query solving. A map READS data from an INPUT location, and OUTPUTS a KEY value PAIR according to the input type.

In Hadoop, a map is a phase in HDFS query solving. A map reads data from an input location, and outputs a key value pair according to the input type.

Discussion