org.apache.hadoop.mapred
Class SequenceFileOutputFormat<K,V>
java.lang.Object
org.apache.hadoop.mapred.FileOutputFormat<K,V>
org.apache.hadoop.mapred.SequenceFileOutputFormat<K,V>
- All Implemented Interfaces:
- OutputFormat<K,V>
- Direct Known Subclasses:
- SequenceFileAsBinaryOutputFormat
@InterfaceAudience.Public
@InterfaceStability.Stable
public class SequenceFileOutputFormat<K,V>
- extends FileOutputFormat<K,V>
An OutputFormat
that writes SequenceFile
s.
Method Summary |
static org.apache.hadoop.io.SequenceFile.CompressionType |
getOutputCompressionType(JobConf conf)
Get the SequenceFile.CompressionType for the output SequenceFile . |
static org.apache.hadoop.io.SequenceFile.Reader[] |
getReaders(org.apache.hadoop.conf.Configuration conf,
org.apache.hadoop.fs.Path dir)
Open the output generated by this format. |
RecordWriter<K,V> |
getRecordWriter(org.apache.hadoop.fs.FileSystem ignored,
JobConf job,
String name,
org.apache.hadoop.util.Progressable progress)
Get the RecordWriter for the given job. |
static void |
setOutputCompressionType(JobConf conf,
org.apache.hadoop.io.SequenceFile.CompressionType style)
Set the SequenceFile.CompressionType for the output SequenceFile . |
Methods inherited from class org.apache.hadoop.mapred.FileOutputFormat |
checkOutputSpecs, getCompressOutput, getOutputCompressorClass, getOutputPath, getPathForCustomFile, getTaskOutputPath, getUniqueName, getWorkOutputPath, setCompressOutput, setOutputCompressorClass, setOutputPath, setWorkOutputPath |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SequenceFileOutputFormat
public SequenceFileOutputFormat()
getRecordWriter
public RecordWriter<K,V> getRecordWriter(org.apache.hadoop.fs.FileSystem ignored,
JobConf job,
String name,
org.apache.hadoop.util.Progressable progress)
throws IOException
- Description copied from interface:
OutputFormat
- Get the
RecordWriter
for the given job.
- Specified by:
getRecordWriter
in interface OutputFormat<K,V>
- Specified by:
getRecordWriter
in class FileOutputFormat<K,V>
job
- configuration for the job whose output is being written.name
- the unique name for this part of the output.progress
- mechanism for reporting progress while writing to file.
- Returns:
- a
RecordWriter
to write the output for the job.
- Throws:
IOException
getReaders
public static org.apache.hadoop.io.SequenceFile.Reader[] getReaders(org.apache.hadoop.conf.Configuration conf,
org.apache.hadoop.fs.Path dir)
throws IOException
- Open the output generated by this format.
- Throws:
IOException
getOutputCompressionType
public static org.apache.hadoop.io.SequenceFile.CompressionType getOutputCompressionType(JobConf conf)
- Get the
SequenceFile.CompressionType
for the output SequenceFile
.
- Parameters:
conf
- the JobConf
- Returns:
- the
SequenceFile.CompressionType
for the output SequenceFile
,
defaulting to SequenceFile.CompressionType.RECORD
setOutputCompressionType
public static void setOutputCompressionType(JobConf conf,
org.apache.hadoop.io.SequenceFile.CompressionType style)
- Set the
SequenceFile.CompressionType
for the output SequenceFile
.
- Parameters:
conf
- the JobConf
to modifystyle
- the SequenceFile.CompressionType
for the output
SequenceFile
Copyright © 2013 Apache Software Foundation. All Rights Reserved.