Loading the traffic data - 7.2




  1. Double-click the tPigLoad labeled traffic to open its Component view.
  2. Click the button next to Edit schema to open the schema editor.
  3. Click the button three times to add three rows and in the Column column, rename them as date, street and traffic, respectively.
  4. Click OK to validate these changes.
  5. In the Mode area, select the Map/Reduce option, as we need the Studio to connect to a remote Hadoop distribution.
  6. In the Distribution list and the Version field, select the Hadoop distribution to be used. In this example, it is Hortonworks Data Platform V1.0.0.
  7. In the Load function list, select the PigStorage function to read the source data, as the data is a structured file in human-readable UTF-8 format.
  8. In the NameNode URI and the Resource Manager fields, enter the locations of the master node and the Resource Manager of the Hadoop distribution to be used, respectively. If you are using WebHDFS, the location should be webhdfs://masternode:portnumber; WebHDFS with SSL is not supported yet.
  9. In the Input file URI field, enter the directory where the data about the traffic situation is stored. As explained earlier, the directory in this example is /user/ychen/tpigmap/date&traffic.
  10. In the Field separator field, enter ; depending on the separator used by the source data.