Uses of Class

Packages that use ID
org.apache.hadoop.mapred A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner. 

Uses of ID in org.apache.hadoop.mapred

Subclasses of ID in org.apache.hadoop.mapred
 class ID
          A general identifier, which internally stores the id as an integer.

Uses of ID in org.apache.hadoop.mapreduce

Subclasses of ID in org.apache.hadoop.mapreduce
 class JobID
          JobID represents the immutable and unique identifier for the job.
 class TaskAttemptID
          TaskAttemptID represents the immutable and unique identifier for a task attempt.
 class TaskID
          TaskID represents the immutable and unique identifier for a Map or Reduce Task.

Methods in org.apache.hadoop.mapreduce with parameters of type ID
 int JobID.compareTo(ID o)
          Compare JobIds by first jtIdentifiers, then by job numbers
 int ID.compareTo(ID that)
          Compare IDs by associated numbers
 int TaskAttemptID.compareTo(ID o)
          Compare TaskIds by first tipIds, then by task numbers.
 int TaskID.compareTo(ID o)
          Compare TaskInProgressIds by first jobIds, then by tip numbers.

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