org.apache.mahout.math.hadoop.stochasticsvd
Class BtJob.BtMapper
java.lang.Object
org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Writable,VectorWritable,org.apache.hadoop.io.LongWritable,SparseRowBlockWritable>
org.apache.mahout.math.hadoop.stochasticsvd.BtJob.BtMapper
- Enclosing class:
- BtJob
public static class BtJob.BtMapper
- extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Writable,VectorWritable,org.apache.hadoop.io.LongWritable,SparseRowBlockWritable>
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper |
org.apache.hadoop.mapreduce.Mapper.Context |
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)
We maintain A and QtHat inputs partitioned the same way, so we
essentially are performing map-side merge here of A and QtHats except
QtHat is stored not row-wise but block-wise. |
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 |
BtJob.BtMapper
public BtJob.BtMapper()
map
protected void map(org.apache.hadoop.io.Writable key,
VectorWritable value,
org.apache.hadoop.mapreduce.Mapper.Context context)
throws IOException,
InterruptedException
- We maintain A and QtHat inputs partitioned the same way, so we
essentially are performing map-side merge here of A and QtHats except
QtHat is stored not row-wise but block-wise.
- Overrides:
map
in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.Writable,VectorWritable,org.apache.hadoop.io.LongWritable,SparseRowBlockWritable>
- 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,org.apache.hadoop.io.LongWritable,SparseRowBlockWritable>
- 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,org.apache.hadoop.io.LongWritable,SparseRowBlockWritable>
- Throws:
IOException
InterruptedException
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