Search

What are the naming conventions for output files from Map phase and Reduce Phase ?



Output files from map phase are named as part-m-xxxxx and output files from reduce phase are named as part-r-xxxxx. These part files are created separately by each individual reducer. Here xxxxx is partition number starting from 00000 and increases sequentially by 1 resulting in 00001, 00002 and so on.
Posted by at
Labels:
  • What are the main components of Mapreduce Job ?
      Main driver class which provides job configuration parameters. Mapper class which must extend org.apache.hadoop.mapredu...
  • TO_CHAR
       This will be used to extract various date formats.     The available date formats as follows.     Syntax: to_char ( date , fo...