The sample code makes the following assumptions.

• The data is contained in HDFS directory /demo/data/temp and the name node is running on port 8081.
• This code writes the data in Greenplum Database format to /demo/data/MRTest1 on HDFS.
• The data contains the following columns, in order.
  1. A long integer
  2. A Boolean
  3. A text string