org.apache.mahout.math.hadoop.stochasticsvd
Class ABtDenseOutJob.ABtMapper

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Writable,VectorWritable,SplitPartitionedWritable,DenseBlockWritable>
      extended by org.apache.mahout.math.hadoop.stochasticsvd.ABtDenseOutJob.ABtMapper
Enclosing class:
ABtDenseOutJob

public static class ABtDenseOutJob.ABtMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Writable,VectorWritable,SplitPartitionedWritable,DenseBlockWritable>

So, here, i preload A block into memory.

A sparse matrix seems to be ideal for that but there are two reasons why i am not using it:


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper
org.apache.hadoop.mapreduce.Mapper.Context
 
Field Summary
protected  Vector sq
           
protected  Vector xi
           
 
Constructor Summary
ABtDenseOutJob.ABtMapper()
           
 
Method Summary
protected  void cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
           
protected  void map(org.apache.hadoop.io.Writable key, VectorWritable value, org.apache.hadoop.mapreduce.Mapper.Context context)
           
protected  void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
           
 
Methods inherited from class org.apache.hadoop.mapreduce.Mapper
run
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

xi

protected Vector xi

sq

protected Vector sq
Constructor Detail

ABtDenseOutJob.ABtMapper

public ABtDenseOutJob.ABtMapper()
Method Detail

map

protected void map(org.apache.hadoop.io.Writable key,
                   VectorWritable value,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException
Overrides:
map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Writable,VectorWritable,SplitPartitionedWritable,DenseBlockWritable>
Throws:
IOException
InterruptedException

cleanup

protected void cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
                throws IOException,
                       InterruptedException
Overrides:
cleanup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Writable,VectorWritable,SplitPartitionedWritable,DenseBlockWritable>
Throws:
IOException
InterruptedException

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
              throws IOException,
                     InterruptedException
Overrides:
setup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Writable,VectorWritable,SplitPartitionedWritable,DenseBlockWritable>
Throws:
IOException
InterruptedException


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