MapReduce Programming info:
Methods of Mapper Class:
Below are the methods, which will play inside the mapper class
Methods of Reducer Class:
Below are the methods, which will play inside the reducer class
Methods of Mapper Class:
Below are the methods, which will play inside the mapper class
|
Modifier
and Type
|
Method
and Description
|
|
protected void
|
(org.apache.hadoop.mapreduce.Mapper.Context context)
Called once at the end of the task.
|
|
protected void
|
org.apache.hadoop.mapreduce.Mapper.Context context)
Called once for each key/value pair in the
input split.
|
|
void
|
(org.apache.hadoop.mapreduce.Mapper.Context context)
Expert users can override this method for
more complete control over the execution of the Mapper.
|
|
protected void
|
Called once at the beginning of the task.
|
Methods of Reducer Class:
Below are the methods, which will play inside the reducer class
|
Modifier
and Type
|
Method
and Description
|
|
protected void
|
Called once at the end of the task.
|
|
protected void
|
This method is called once for each key.
|
|
void
|
Advanced application writers can use
the run(org.apache.hadoop.mapreduce.Reducer.Context) method
to control how the reduce task works.
|
|
protected void
|
Called once at the start of the task.
|
No comments:
Post a Comment