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java.lang.Objectorg.apache.hadoop.contrib.index.mapred.IndexUpdatePartitioner
public class IndexUpdatePartitioner
This partitioner class puts the values of the same key - in this case the same shard - in the same partition.
Constructor Summary | |
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IndexUpdatePartitioner()
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Method Summary | |
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void |
configure(JobConf job)
Initializes a new instance from a JobConf . |
int |
getPartition(Shard key,
IntermediateForm value,
int numPartitions)
Get the paritition number for a given key (hence record) given the total number of partitions i.e. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public IndexUpdatePartitioner()
Method Detail |
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public int getPartition(Shard key, IntermediateForm value, int numPartitions)
Partitioner
Typically a hash function on a all or a subset of the key.
getPartition
in interface Partitioner<Shard,IntermediateForm>
key
- the key to be paritioned.value
- the entry value.numPartitions
- the total number of partitions.
key
.public void configure(JobConf job)
JobConfigurable
JobConf
.
configure
in interface JobConfigurable
job
- the configuration
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