Split

/**
   * This represents the meta information about the task split.
   * The main fields are 
   *     - start offset in actual split
   *     - data length that will be processed in this split
   *     - hosts on which this split is local
   */

public static class SplitMetaInfo implements Writable

 /**
   * This represents the meta information about the task split that the 
   * JobTracker creates
   */
public static class TaskSplitMetaInfo


 /**
   * This represents the meta information about the task split that the 
   * task gets
   */
public static class TaskSplitIndex