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java.lang.Object org.apache.hadoop.mapred.FileOutputFormat<K,V> org.apache.hadoop.mapred.SequenceFileOutputFormat<K,V>
@InterfaceAudience.Public @InterfaceStability.Stable public class SequenceFileOutputFormat<K,V>
An OutputFormat
that writes SequenceFile
s.
Constructor Summary | |
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SequenceFileOutputFormat()
|
Method Summary | |
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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(Configuration conf,
Path dir)
Open the output generated by this format. |
RecordWriter<K,V> |
getRecordWriter(FileSystem ignored,
JobConf job,
String name,
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 |
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checkOutputSpecs, getCompressOutput, getOutputCompressorClass, getOutputPath, getPathForCustomFile, getTaskOutputPath, getUniqueName, getWorkOutputPath, setCompressOutput, setOutputCompressorClass, setOutputPath |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public SequenceFileOutputFormat()
Method Detail |
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public RecordWriter<K,V> getRecordWriter(FileSystem ignored, JobConf job, String name, Progressable progress) throws IOException
OutputFormat
RecordWriter
for the given job.
getRecordWriter
in interface OutputFormat<K,V>
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.
RecordWriter
to write the output for the job.
IOException
public static org.apache.hadoop.io.SequenceFile.Reader[] getReaders(Configuration conf, Path dir) throws IOException
IOException
public static org.apache.hadoop.io.SequenceFile.CompressionType getOutputCompressionType(JobConf conf)
SequenceFile.CompressionType
for the output SequenceFile
.
conf
- the JobConf
SequenceFile.CompressionType
for the output SequenceFile
,
defaulting to SequenceFile.CompressionType.RECORD
public static void setOutputCompressionType(JobConf conf, org.apache.hadoop.io.SequenceFile.CompressionType style)
SequenceFile.CompressionType
for the output SequenceFile
.
conf
- the JobConf
to modifystyle
- the SequenceFile.CompressionType
for the output
SequenceFile
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