Saturday, February 20, 2010

Hadoop: using ChainMapper

ChainMapper's are a way to perform: [MAP+ / REDUCE MAP*] operations.

  • Find below an example main function written to handle a chainmapper.

Notes:


  • While a chainmapper can be used to simplify processing. Usually be deftly handling the data, most [MAP+ / REDUCE MAP*] can be reduced to [MAP / REDUCE MAP]