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.
CellCreator	Facade to create Cells for HFileOutputFormat.
CellSerialization	Use to specify the type of serialization for the mappers and reducers
CellSortReducer	Emits sorted Cells.
CopyTable	Tool used to copy a table to another one which can be on a different setup.
Export	Export an HBase table.
GroupingTableMapper	Extract grouping columns from input record.
HFileOutputFormat2	Writes HFiles.
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.
ImportTsv	Tool to import data from a TSV file.
KeyValueSerialization	Deprecated Use CellSerialization.
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.
MultiTableSnapshotInputFormat	MultiTableSnapshotInputFormat generalizes TableSnapshotInputFormat allowing a MapReduce job to run over one or more table snapshots, with one or more scans configured for each.
MutationSerialization
PutCombiner<K>	Combine Puts.
PutSortReducer	Emits sorted Puts.
ResultSerialization
RoundRobinTableInputFormat	Process the return from super-class TableInputFormat (TIF) so as to undo any clumping of InputSplits around RegionServers.
RowCounter	A job with a just a map phase to count rows.
SimpleTotalOrderPartitioner<VALUE>	A partitioner that takes start and end keys and uses bigdecimal to figure which reduce a key belongs to.
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.
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.
WALPlayer	A tool to replay WAL files as a M/R job.

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.