in Big Data | Hadoop by

Explain how do ‘map’ and ‘reduce’ works.

1 Answer

0 votes
by

Namenode takes the input and divide it into parts and assign them to data nodes. These datanodes process the tasks assigned to them and make a key-value pair and returns the intermediate output to the Reducer. The reducer collects this key value pairs of all the datanodes and combines them and generates the final output.

Related questions

0 votes
asked Jan 7, 2020 in Big Data | Hadoop by sharadyadav1986
0 votes
asked Jan 13, 2020 in Big Data | Hadoop by AdilsonLima
0 votes
asked Jan 13, 2020 in Big Data | Hadoop by AdilsonLima
...