org.apache.hadoop.mapred

Interface InputSplit

All Superinterfaces:

org.apache.hadoop.io.Writable

All Known Subinterfaces:

InputSplitWithLocationInfo

All Known Implementing Classes:

CombineFileSplit, CompositeInputSplit, DBInputFormat.DBInputSplit, FileSplit, MultiFileSplit

@InterfaceAudience.Public
@InterfaceStability.Stable
public interface InputSplit
extends org.apache.hadoop.io.Writable

InputSplit represents the data to be processed by an individual Mapper.

Typically, it presents a byte-oriented view on the input and is the responsibility of RecordReader of the job to process this and present a record-oriented view.

See Also:

InputFormat, RecordReader

Method Summary

Methods

Modifier and Type	Method and Description
long	getLength() Get the total number of bytes in the data of the InputSplit.
String[]	getLocations() Get the list of hostnames where the input split is located.

Methods inherited from interface org.apache.hadoop.io.Writable

readFields, write

Method Detail

getLength

long getLength()
               throws IOException

Get the total number of bytes in the data of the InputSplit.

Returns:

the number of bytes in the input split.

Throws:

IOException

getLocations

String[] getLocations()
                      throws IOException

Get the list of hostnames where the input split is located.

Returns:

list of hostnames where data of the InputSplit is located as an array of Strings.

Throws:

IOException