In the previous lab, we have learned about Hadoop's distributed file system for storing files (HDFS) as well as how massive amounts of data are stored in HDFS specifically. After the problem of storage has been solved, the next step is to use the data for calculation. This course will introduce Hadoop's core computing framework: MapReduce. This course will help you understand the working pattern of the MapReduce computing framework and how to develop MapReduce applications.