| Package | Description | 
|---|---|
| org.apache.hadoop.mapred | |
| org.apache.hadoop.mapreduce | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | IDA general identifier, which internally stores the id
 as an integer. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | JobIDJobID represents the immutable and unique identifier for 
 the job. | 
| class  | TaskAttemptIDTaskAttemptID represents the immutable and unique identifier for 
 a task attempt. | 
| class  | TaskIDTaskID represents the immutable and unique identifier for 
 a Map or Reduce Task. | 
| Modifier and Type | Method and Description | 
|---|---|
| int | TaskID. compareTo(ID o)Compare TaskInProgressIds by first jobIds, then by tip numbers. | 
| 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. | 
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