Package | Description |
---|---|
org.apache.hadoop.examples |
Hadoop example code.
|
org.apache.hadoop.mapreduce | |
org.apache.hadoop.mapreduce.lib.reduce |
Modifier and Type | Class and Description |
---|---|
static class |
SecondarySort.Reduce
A reducer class that just emits the sum of the input values.
|
static class |
WordCount.IntSumReducer |
Modifier and Type | Method and Description |
---|---|
Class<? extends Reducer<?,?,?,?>> |
JobContext.getCombinerClass()
Get the combiner class for the job.
|
Class<? extends Reducer<?,?,?,?>> |
JobContext.getReducerClass()
Get the
Reducer class for the job. |
Modifier and Type | Method and Description |
---|---|
void |
Job.setCombinerClass(Class<? extends Reducer> cls)
Set the combiner class for the job.
|
void |
Job.setReducerClass(Class<? extends Reducer> cls)
Set the
Reducer for the job. |
Modifier and Type | Class and Description |
---|---|
class |
IntSumReducer<Key> |
class |
LongSumReducer<KEY> |
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