TValue- Tuple type
T- Writable tuple type
public abstract class AbstractCharacteristicSetGeneratingReducer<TValue,T extends AbstractNodeTupleWritable<TValue>> extends org.apache.hadoop.mapreduce.Reducer<NodeWritable,T,CharacteristicSetWritable,org.apache.hadoop.io.NullWritable>
This produces the characteristic sets as both the key and value so that in a subsequent job the characteristic steps may be further combined together to total up the usage counts appropriately.
It is important to note that the output from this mapper can be very large and since it typically needs to be written to HDFS before being processed by further jobs it is strongly recommended that you use appropriate output compression
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Licenced under the Apache License, Version 2.0