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Packages that use MapReduceBase | |
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org.apache.hadoop.contrib.index.mapred | |
org.apache.hadoop.mapred.lib | Library of generally useful mappers, reducers, and partitioners. |
Uses of MapReduceBase in org.apache.hadoop.contrib.index.mapred |
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Subclasses of MapReduceBase in org.apache.hadoop.contrib.index.mapred | |
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class |
IndexUpdateCombiner
This combiner combines multiple intermediate forms into one intermediate form. |
class |
IndexUpdateMapper<K extends WritableComparable,V extends Writable>
This class applies local analysis on a key-value pair and then convert the result docid-operation pair to a shard-and-intermediate form pair. |
class |
IndexUpdateReducer
This reducer applies to a shard the changes for it. |
Uses of MapReduceBase in org.apache.hadoop.mapred.lib |
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Subclasses of MapReduceBase in org.apache.hadoop.mapred.lib | |
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class |
IdentityMapper<K,V>
Implements the identity function, mapping inputs directly to outputs. |
class |
IdentityReducer<K,V>
Performs no reduction, writing all input values directly to the output. |
class |
InverseMapper<K,V>
A Mapper that swaps keys and values. |
class |
LongSumReducer<K>
A Reducer that sums long values. |
class |
RegexMapper<K>
A Mapper that extracts text matching a regular expression. |
class |
TokenCountMapper<K>
A Mapper that maps text values into |
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