| Package | Description | 
|---|---|
| org.apache.hadoop.mapred | |
| org.apache.hadoop.mapreduce | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
ID
A general identifier, which internally stores the id
 as an integer. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
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. 
 | 
| Modifier and Type | Method and Description | 
|---|---|
int | 
ID.compareTo(ID that)
Compare IDs by associated numbers 
 | 
int | 
JobID.compareTo(ID o)
Compare JobIds by first jtIdentifiers, then by job 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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