org.apache.hadoop.hbase.mapreduce

Class MultiTableHFileOutputFormat

java.lang.Object

org.apache.hadoop.mapreduce.OutputFormat<K,V>

org.apache.hadoop.mapreduce.lib.output.FileOutputFormat<ImmutableBytesWritable,Cell>

org.apache.hadoop.hbase.mapreduce.HFileOutputFormat2

org.apache.hadoop.hbase.mapreduce.MultiTableHFileOutputFormat

@InterfaceAudience.Public
public class MultiTableHFileOutputFormat
extends HFileOutputFormat2

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

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.Counter

Field Summary

Fields inherited from class org.apache.hadoop.hbase.mapreduce.HFileOutputFormat2

DATABLOCK_ENCODING_OVERRIDE_CONF_KEY, LOCALITY_SENSITIVE_CONF_KEY, STORAGE_POLICY_PROPERTY, STORAGE_POLICY_PROPERTY_CF_PREFIX, tableSeparator

Fields inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

BASE_OUTPUT_NAME, COMPRESS, COMPRESS_CODEC, COMPRESS_TYPE, OUTDIR, PART

Constructor Summary

Constructors

Constructor and Description
MultiTableHFileOutputFormat()

Method Summary

Modifier and Type	Method and Description
static void	configureIncrementalLoad(org.apache.hadoop.mapreduce.Job job, List<org.apache.hadoop.hbase.mapreduce.HFileOutputFormat2.TableInfo> multiTableDescriptors) Analogous to HFileOutputFormat2.configureIncrementalLoad(Job, TableDescriptor, RegionLocator), this function will configure the requisite number of reducers to write HFiles for multple tables simultaneously
static byte[]	createCompositeKey(byte[] tableName, byte[] suffix) Creates a composite key to use as a mapper output key when using MultiTableHFileOutputFormat.configureIncrementaLoad to set up bulk ingest job
static byte[]	createCompositeKey(byte[] tableName, ImmutableBytesWritable suffix) Alternate api which accepts an ImmutableBytesWritable for the suffix
static byte[]	createCompositeKey(String tableName, ImmutableBytesWritable suffix) Alternate api which accepts a String for the tableName and ImmutableBytesWritable for the suffix
protected static byte[]	getSuffix(byte[] keyBytes)
protected static byte[]	getTableName(byte[] keyBytes)

Methods inherited from class org.apache.hadoop.hbase.mapreduce.HFileOutputFormat2

combineTableNameSuffix, configureIncrementalLoad, configureIncrementalLoad, configureIncrementalLoadMap, getRecordWriter, getTableNameSuffixedWithFamily

Methods inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

checkOutputSpecs, getCompressOutput, getDefaultWorkFile, getOutputCommitter, getOutputCompressorClass, getOutputName, getOutputPath, getPathForWorkFile, getUniqueFile, getWorkOutputPath, setCompressOutput, setOutputCompressorClass, setOutputName, setOutputPath

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MultiTableHFileOutputFormat

public MultiTableHFileOutputFormat()

Method Detail

createCompositeKey

public static byte[] createCompositeKey(byte[] tableName,
                                        byte[] suffix)

Creates a composite key to use as a mapper output key when using MultiTableHFileOutputFormat.configureIncrementaLoad to set up bulk ingest job

Parameters:

tableName - Name of the Table - Eg: TableName.getNameAsString()

suffix - Usually represents a rowkey when creating a mapper key or column family

Returns:

byte[] representation of composite key

createCompositeKey

public static byte[] createCompositeKey(byte[] tableName,
                                        ImmutableBytesWritable suffix)

Alternate api which accepts an ImmutableBytesWritable for the suffix

See Also:

createCompositeKey(byte[], byte[])

createCompositeKey

public static byte[] createCompositeKey(String tableName,
                                        ImmutableBytesWritable suffix)

Alternate api which accepts a String for the tableName and ImmutableBytesWritable for the suffix

See Also:

createCompositeKey(byte[], byte[])

configureIncrementalLoad

public static void configureIncrementalLoad(org.apache.hadoop.mapreduce.Job job,
                                            List<org.apache.hadoop.hbase.mapreduce.HFileOutputFormat2.TableInfo> multiTableDescriptors)
                                     throws IOException

Analogous to HFileOutputFormat2.configureIncrementalLoad(Job, TableDescriptor, RegionLocator), this function will configure the requisite number of reducers to write HFiles for multple tables simultaneously

Parameters:

job - See Job

multiTableDescriptors - Table descriptor and region locator pairs

Throws:

IOException

getTableName

protected static byte[] getTableName(byte[] keyBytes)

getSuffix

protected static byte[] getSuffix(byte[] keyBytes)