Package org.apache.hadoop.hbase.mapreduce

Provides HBase MapReduce Input/OutputFormats, a table indexing MapReduce job, and utility methods.

See: Description

Interface Summary

Interface	Description
VisibilityExpressionResolver	Interface to convert visibility expressions into Tags for storing along with Cells in HFiles.

Class Summary

Class	Description
CellCounter	A job with a a map and reduce phase to count cells in a table.
CellCounter.CellCounterMapper	Mapper that runs the count.
CellCounter.IntSumReducer<Key>
CellCreator	Facade to create Cells for HFileOutputFormat.
CellSerialization	Use to specify the type of serialization for the mappers and reducers
CellSerialization.CellDeserializer
CellSerialization.CellSerializer
CellSortReducer	Emits sorted Cells.
CopyTable	Tool used to copy a table to another one which can be on a different setup.
DefaultVisibilityExpressionResolver	This implementation creates tags by expanding expression using label ordinal.
Driver	Driver for hbase mapreduce jobs.
Export	Export an HBase table.
ExportUtils	Some helper methods are used by Export and org.apache.hadoop.hbase.coprocessor.Export (in hbase-endpooint).
GroupingTableMapper	Extract grouping columns from input record.
HashTable
HashTable.HashMapper
HashTable.ResultHasher
HashTable.TableHash
HFileInputFormat	Simple MR input format for HFiles.
HFileInputFormat.HFileRecordReader	Record reader for HFiles.
HFileOutputFormat2	Writes HFiles.
HFileOutputFormat2.TableInfo
HFileOutputFormat2.WriterLength
HRegionPartitioner<KEY,VALUE>	This is used to partition the output keys into groups of keys.
IdentityTableMapper	Pass the given key and record as-is to the reduce phase.
IdentityTableReducer	Convenience class that simply writes all values (which must be Put or Delete instances) passed to it out to the configured HBase table.
Import	Import data written by Export.
Import.CellImporter	A mapper that just writes out KeyValues.
Import.CellReducer
Import.CellSortImporter
Import.CellWritableComparable
Import.CellWritableComparable.CellWritableComparator
Import.CellWritableComparablePartitioner
Import.Importer	Write table content out to files in hdfs.
Import.KeyValueImporter	Deprecated Use Import.CellImporter.
Import.KeyValueReducer	Deprecated Use Import.CellReducer.
Import.KeyValueSortImporter	Deprecated Use Import.CellSortImporter.
Import.KeyValueWritableComparable
Import.KeyValueWritableComparable.KeyValueWritableComparator
Import.KeyValueWritableComparablePartitioner	Deprecated Use Import.CellWritableComparablePartitioner.
ImportTsv	Tool to import data from a TSV file.
ImportTsv.TsvParser
IndexBuilder	Example map/reduce job to construct index tables that can be used to quickly find a row based on the value of a column.
IndexBuilder.Map	Internal Mapper to be run by Hadoop.
JarFinder	Finds the Jar for a class.
JobUtil	Utility methods to interact with a job.
KeyValueSerialization	Deprecated Use CellSerialization.
KeyValueSerialization.KeyValueDeserializer
KeyValueSerialization.KeyValueSerializer
KeyValueSortReducer	Deprecated Use CellSortReducer.
LoadIncrementalHFiles	Deprecated As of release 2.0.0, this will be removed in HBase 3.0.0.
LoadIncrementalHFiles.LoadQueueItem	Deprecated As of release 2.0.0, this will be removed in HBase 3.0.0.
MultiTableHFileOutputFormat	Create 3 level tree directory, first level is using table name as parent directory and then use family name as child directory, and all related HFiles for one family are under child directory -tableName1 -columnFamilyName1 -columnFamilyName2 -HFiles -tableName2 -columnFamilyName1 -HFiles -columnFamilyName2
MultiTableInputFormat	Convert HBase tabular data from multiple scanners into a format that is consumable by Map/Reduce.
MultiTableInputFormatBase	A base for MultiTableInputFormats.
MultiTableOutputFormat	Hadoop output format that writes to one or more HBase tables.
MultiTableOutputFormat.MultiTableRecordWriter	Record writer for outputting to multiple HTables.
MultiTableSnapshotInputFormat	MultiTableSnapshotInputFormat generalizes TableSnapshotInputFormat allowing a MapReduce job to run over one or more table snapshots, with one or more scans configured for each.
MultiTableSnapshotInputFormatImpl	Shared implementation of mapreduce code over multiple table snapshots.
MultithreadedTableMapper<K2,V2>	Multithreaded implementation for @link org.apache.hbase.mapreduce.TableMapper
MutationSerialization
MutationSerialization.MutationDeserializer
MutationSerialization.MutationSerializer
PutCombiner<K>	Combine Puts.
PutSortReducer	Emits sorted Puts.
RegionSizeCalculator	Computes size of each region for given table and given column families.
ResultSerialization
ResultSerialization.Result94Deserializer	The following deserializer class is used to load exported file of 0.94
ResultSerialization.ResultDeserializer
ResultSerialization.ResultSerializer
RowCounter	A job with a just a map phase to count rows.
RowCounter.RowCounterCommandLineParser
RowCounter.RowCounterMapper	Mapper that runs the count.
SampleUploader	Sample Uploader MapReduce
SampleUploader.Uploader
SimpleTotalOrderPartitioner<VALUE>	A partitioner that takes start and end keys and uses bigdecimal to figure which reduce a key belongs to.
SyncTable
SyncTable.SyncMapper
SyncTable.SyncMapper.CellScanner
TableInputFormat	Convert HBase tabular data into a format that is consumable by Map/Reduce.
TableInputFormatBase	A base for TableInputFormats.
TableMapper<KEYOUT,VALUEOUT>	Extends the base Mapper class to add the required input key and value classes.
TableMapReduceUtil	Utility for TableMapper and TableReducer
TableOutputCommitter	Small committer class that does not do anything.
TableOutputFormat<KEY>	Convert Map/Reduce output and write it to an HBase table.
TableRecordReader	Iterate over an HBase table data, return (ImmutableBytesWritable, Result) pairs.
TableRecordReaderImpl	Iterate over an HBase table data, return (ImmutableBytesWritable, Result) pairs.
TableReducer<KEYIN,VALUEIN,KEYOUT>	Extends the basic Reducer class to add the required key and value input/output classes.
TableSnapshotInputFormat	TableSnapshotInputFormat allows a MapReduce job to run over a table snapshot.
TableSnapshotInputFormat.TableSnapshotRegionRecordReader
TableSnapshotInputFormat.TableSnapshotRegionSplit
TableSnapshotInputFormatImpl	Hadoop MR API-agnostic implementation for mapreduce over table snapshots.
TableSnapshotInputFormatImpl.InputSplit	Implementation class for InputSplit logic common between mapred and mapreduce.
TableSnapshotInputFormatImpl.RecordReader	Implementation class for RecordReader logic common between mapred and mapreduce.
TableSplit	A table split corresponds to a key range (low, high) and an optional scanner.
TextSortReducer	Emits Sorted KeyValues.
TsvImporterMapper	Write table content out to files in hdfs.
TsvImporterTextMapper	Write table content out to map output files.
WALInputFormat	Simple InputFormat for WAL files.
WALInputFormat.WALKeyRecordReader	handler for non-deprecated WALKey version.
WALInputFormat.WALRecordReader<K extends WALKey>	RecordReader for an WAL file.
WALInputFormat.WALSplit	InputSplit for WAL files.
WALPlayer	A tool to replay WAL files as a M/R job.
WALPlayer.WALCellMapper	A mapper that just writes out Cells.
WALPlayer.WALKeyValueMapper	Deprecated Use WALPlayer.WALCellMapper.
WALPlayer.WALMapper	A mapper that writes out Mutation to be directly applied to a running HBase instance.

Enum Summary

Enum	Description
CellCounter.CellCounterMapper.Counters	Counter enumeration to count the actual rows.
RowCounter.RowCounterMapper.Counters	Counter enumeration to count the actual rows.
SyncTable.SyncMapper.Counter
TableSplit.Version
WALPlayer.Counter	Enum for map metrics.

Exception Summary

Exception	Description
ImportTsv.TsvParser.BadTsvLineException

Package org.apache.hadoop.hbase.mapreduce Description

Provides HBase MapReduce Input/OutputFormats, a table indexing MapReduce job, and utility methods.

See HBase and MapReduce in the HBase Reference Guide for mapreduce over hbase documentation.