In the below example lets see how to create a custom Writable that can be used as a key in…
We can implement secondary sorting in mapreduce using the below steps 1. Make the key a composite of the natural…
Problem to solve – Load the collector data from mysql database and process it using mapreduce framework. We have a…
External source output pattern writes data to a system outside of Hadoop and HDFS.With this pattern, we are able to…
Partition pruning configures the way the framework picks input splits and drops files from being loaded into MapReduce based on…
Generating data isn’t common. Typically you’ll generate a bunch of the data at once then use it over and over…
Problem to solve : We wish to know how have the genres ranked by Average Rating, for each profession and…