HFileOutputFormat2 (Apache HBase 1.2.12 API)

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

```
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class HFileOutputFormat2
extends org.apache.hadoop.mapreduce.lib.output.FileOutputFormat<ImmutableBytesWritable,Cell>
```
Writes HFiles. Passed Cells must arrive in order. Writes current time as the sequence id for the file. Sets the major compacted attribute on created @{link HFiles. Calling write(null,null) will forcibly roll all HFiles being written.
Using this class as part of a MapReduce job is best done using configureIncrementalLoad(Job, Table, RegionLocator).

Field Summary

Fields
Modifier and Type Field and Description

static String DATABLOCK_ENCODING_OVERRIDE_CONF_KEY
- Fields inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat
  BASE_OUTPUT_NAME, COMPRESS, COMPRESS_CODEC, COMPRESS_TYPE, OUTDIR, PART

Fields
Modifier and Type	Field and Description
`static String`	`DATABLOCK_ENCODING_OVERRIDE_CONF_KEY`

Constructor Summary

Constructors
Constructor and Description

HFileOutputFormat2()

Constructors
Constructor and Description
`HFileOutputFormat2()`

Method Summary

Methods
Modifier and Type	Method and Description
`static void`	`configureIncrementalLoad(org.apache.hadoop.mapreduce.Job job, org.apache.hadoop.hbase.client.HTable table)` Deprecated. Use `configureIncrementalLoad(Job, Table, RegionLocator)` instead.
`static void`	`configureIncrementalLoad(org.apache.hadoop.mapreduce.Job job, HTableDescriptor tableDescriptor, RegionLocator regionLocator)` Configure a MapReduce Job to perform an incremental load into the given table.
`static void`	`configureIncrementalLoad(org.apache.hadoop.mapreduce.Job job, Table table, RegionLocator regionLocator)` Configure a MapReduce Job to perform an incremental load into the given table.
`static void`	`configureIncrementalLoadMap(org.apache.hadoop.mapreduce.Job job, Table table)`
`org.apache.hadoop.mapreduce.RecordWriter<ImmutableBytesWritable,Cell>`	`getRecordWriter(org.apache.hadoop.mapreduce.TaskAttemptContext context)`

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

- Field Detail
  - DATABLOCK_ENCODING_OVERRIDE_CONF_KEY
```
public static final String DATABLOCK_ENCODING_OVERRIDE_CONF_KEY
```
    See Also:
    Constant Field Values
- Constructor Detail
  - HFileOutputFormat2
```
public HFileOutputFormat2()
```
- Method Detail
  - getRecordWriter
```
public org.apache.hadoop.mapreduce.RecordWriter<ImmutableBytesWritable,Cell> getRecordWriter(org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                                                      throws IOException,
                                                                                             InterruptedException
```
    Specified by:
    
    getRecordWriter in class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat<ImmutableBytesWritable,Cell>
    
    Throws:
    
    IOException
    
    InterruptedException
  - configureIncrementalLoad
```
@Deprecated
public static void configureIncrementalLoad(org.apache.hadoop.mapreduce.Job job,
                                       org.apache.hadoop.hbase.client.HTable table)
                                     throws IOException
```
    Deprecated. Use configureIncrementalLoad(Job, Table, RegionLocator) instead.
    Configure a MapReduce Job to perform an incremental load into the given table. This
    - Inspects the table to configure a total order partitioner
    - Uploads the partitions file to the cluster and adds it to the DistributedCache
    - Sets the number of reduce tasks to match the current number of regions
    - Sets the output key/value class to match HFileOutputFormat2's requirements
    - Sets the reducer up to perform the appropriate sorting (either KeyValueSortReducer or PutSortReducer)
    The user should be sure to set the map output value class to either KeyValue or Put before running this function.
    Throws:
    
    IOException
  - configureIncrementalLoad
```
public static void configureIncrementalLoad(org.apache.hadoop.mapreduce.Job job,
                            Table table,
                            RegionLocator regionLocator)
                                     throws IOException
```
    Configure a MapReduce Job to perform an incremental load into the given table. This
    - Inspects the table to configure a total order partitioner
    - Uploads the partitions file to the cluster and adds it to the DistributedCache
    - Sets the number of reduce tasks to match the current number of regions
    - Sets the output key/value class to match HFileOutputFormat2's requirements
    - Sets the reducer up to perform the appropriate sorting (either KeyValueSortReducer or PutSortReducer)
    The user should be sure to set the map output value class to either KeyValue or Put before running this function.
    Throws:
    
    IOException
  - configureIncrementalLoad
```
public static void configureIncrementalLoad(org.apache.hadoop.mapreduce.Job job,
                            HTableDescriptor tableDescriptor,
                            RegionLocator regionLocator)
                                     throws IOException
```
    Configure a MapReduce Job to perform an incremental load into the given table. This
    - Inspects the table to configure a total order partitioner
    - Uploads the partitions file to the cluster and adds it to the DistributedCache
    - Sets the number of reduce tasks to match the current number of regions
    - Sets the output key/value class to match HFileOutputFormat2's requirements
    - Sets the reducer up to perform the appropriate sorting (either KeyValueSortReducer or PutSortReducer)
    The user should be sure to set the map output value class to either KeyValue or Put before running this function.
    Throws:
    
    IOException
  - configureIncrementalLoadMap
```
public static void configureIncrementalLoadMap(org.apache.hadoop.mapreduce.Job job,
                               Table table)
                                        throws IOException
```
    Throws:
    
    IOException

Class HFileOutputFormat2

Field Summary

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

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

Field Detail

DATABLOCK_ENCODING_OVERRIDE_CONF_KEY

Constructor Detail

HFileOutputFormat2

Method Detail

getRecordWriter

configureIncrementalLoad

configureIncrementalLoad

configureIncrementalLoad

configureIncrementalLoadMap