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#Org.apache.hadoop.mapred.lib Classes and Interfaces - 51 results found.
NameDescriptionTypePackageFramework
BinaryPartitionerPartition BinaryComparable keys using a configurable part of the bytes array returned by BinaryComparable.Classorg.apache.hadoop.mapred.libApache Hadoop
ChainMapperThe ChainMapper class allows to use multiple Mapper classes within a single The Mapper classes are invoked in a chained (or piped) fashion, the output ofClassorg.apache.hadoop.mapred.libApache Hadoop
ChainReducerThe ChainReducer class allows to chain multiple Mapper classes after a Reducer within the Reducer task.Classorg.apache.hadoop.mapred.libApache Hadoop
CombineFileInputFormatAn abstract InputFormat that returns CombineFileSplit's in InputFormat.Classorg.apache.hadoop.mapred.libApache Hadoop
CombineFileRecordReaderA generic RecordReader that can hand out different recordReaders for each chunk in a CombineFileSplit.Classorg.apache.hadoop.mapred.libApache Hadoop
CombineFileRecordReaderWrapperA wrapper class for a record reader that handles a single file split.Classorg.apache.hadoop.mapred.libApache Hadoop
CombineFileSplitClassorg.apache.hadoop.mapred.libApache Hadoop
CombineSequenceFileInputFormatInput format that is a CombineFileInputFormat-equivalent for SequenceFileInputFormat.Classorg.apache.hadoop.mapred.libApache Hadoop
CombineTextInputFormatInput format that is a CombineFileInputFormat-equivalent forSee Also:CombineFileInputFormatClassorg.apache.hadoop.mapred.libApache Hadoop
DBConfigurationClassorg.apache.hadoop.mapred.lib.dbApache Hadoop
DBInputFormatClassorg.apache.hadoop.mapred.lib.dbApache Hadoop
DBOutputFormatClassorg.apache.hadoop.mapred.lib.dbApache Hadoop
DoubleValueSumClassorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
FieldSelectionMapReduceThis class implements a mapper/reducer class that can be used to perform field selections in a manner similar to unix cut.Classorg.apache.hadoop.mapred.libApache Hadoop
FilterOutputFormatFilterOutputFormat is a convenience class that wraps OutputFormat.Classorg.apache.hadoop.mapred.libApache Hadoop
HashPartitionerPartition keys by their Object.Classorg.apache.hadoop.mapred.libApache Hadoop
IdentityMapperClassorg.apache.hadoop.mapred.libApache Hadoop
IdentityReducerPerforms no reduction, writing all input values directly to the output.Classorg.apache.hadoop.mapred.libApache Hadoop
InputSamplerClassorg.apache.hadoop.mapred.libApache Hadoop
InverseMapperA Mapper that swaps keys and values.Classorg.apache.hadoop.mapred.libApache Hadoop
KeyFieldBasedComparatorThis comparator implementation provides a subset of the features provided by the Unix/GNU Sort.Classorg.apache.hadoop.mapred.libApache Hadoop
KeyFieldBasedPartitionerDefines a way to partition keys based on certain key fields (also see KeyFieldBasedComparator.Classorg.apache.hadoop.mapred.libApache Hadoop
LazyOutputFormatA Convenience class that creates output lazily.Classorg.apache.hadoop.mapred.libApache Hadoop
LongSumReducerA Reducer that sums long values.Classorg.apache.hadoop.mapred.libApache Hadoop
LongValueMaxThis class implements a value aggregator that maintain the maximum of a sequence of long values.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
LongValueMinThis class implements a value aggregator that maintain the minimum of a sequence of long values.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
LongValueSumThis class implements a value aggregator that sums up a sequence of long values.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
MultipleInputsThis class supports MapReduce jobs that have multiple input paths with a different InputFormat and Mapper for each pathClassorg.apache.hadoop.mapred.libApache Hadoop
MultipleOutputFormatThis abstract class extends the FileOutputFormat, allowing to write the output data to different output files.Classorg.apache.hadoop.mapred.libApache Hadoop
MultipleOutputsThe MultipleOutputs class simplifies writting to additional outputs other than the job default output via the OutputCollector passed toClassorg.apache.hadoop.mapred.libApache Hadoop
MultipleSequenceFileOutputFormatThis class extends the MultipleOutputFormat, allowing to write the output data to different output files in sequence file output format.Classorg.apache.hadoop.mapred.libApache Hadoop
MultipleTextOutputFormatThis class extends the MultipleOutputFormat, allowing to write the output data to different output files in Text output format.Classorg.apache.hadoop.mapred.libApache Hadoop
MultithreadedMapRunnerMultithreaded implementation for MapRunnable.Classorg.apache.hadoop.mapred.libApache Hadoop
NLineInputFormatNLineInputFormat which splits N lines of input as one split.Classorg.apache.hadoop.mapred.libApache Hadoop
NullOutputFormatConsume all outputs and put them in /dev/null.Classorg.apache.hadoop.mapred.libApache Hadoop
RegexMapperA Mapper that extracts text matching a regular expression.Classorg.apache.hadoop.mapred.libApache Hadoop
StringValueMaxThis class implements a value aggregator that maintain the biggest of a sequence of strings.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
StringValueMinThis class implements a value aggregator that maintain the smallest of a sequence of strings.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
TokenCountMapperA Mapper that maps text values into pairs.Classorg.apache.hadoop.mapred.libApache Hadoop
TotalOrderPartitionerPartitioner effecting a total order by reading split points from an externally generated source.Classorg.apache.hadoop.mapred.libApache Hadoop
UniqValueCountThis class implements a value aggregator that dedupes a sequence of objects.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
UserDefinedValueAggregatorDescriptorThis class implements a wrapper for a user defined value aggregator It serves two functions: One is to create an object of Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
ValueAggregatorThis interface defines the minimal protocol for value aggregators.Interfaceorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
ValueAggregatorBaseDescriptorThis class implements the common functionalities of the subclasses of ValueAggregatorDescriptor class.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
ValueAggregatorCombinerThis class implements the generic combiner of Aggregate.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
ValueAggregatorDescriptorThis interface defines the contract a value aggregator descriptor must support.Interfaceorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
ValueAggregatorJobThis is the main class for creating a map/reduce job using Aggregate framework.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
ValueAggregatorJobBaseThis abstract class implements some common functionalities of the the generic mapper, reducer and combiner classes of Aggregate.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
ValueAggregatorMapperThis class implements the generic mapper of Aggregate.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
ValueAggregatorReducerThis class implements the generic reducer of Aggregate.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop
ValueHistogramThis class implements a value aggregator that computes the histogram of a sequence of strings.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoop