@InterfaceAudience.Public @InterfaceStability.Stable public abstract class InputSplit extends Object
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.
InputFormat
,
RecordReader
Constructor and Description |
---|
InputSplit() |
Modifier and Type | Method and Description |
---|---|
abstract long |
getLength()
Get the size of the split, so that the input splits can be sorted by size.
|
SplitLocationInfo[] |
getLocationInfo()
Gets info about which nodes the input split is stored on and how it is
stored at each location.
|
abstract String[] |
getLocations()
Get the list of nodes by name where the data for the split would be local.
|
public abstract long getLength() throws IOException, InterruptedException
IOException
InterruptedException
public abstract String[] getLocations() throws IOException, InterruptedException
IOException
InterruptedException
@InterfaceStability.Evolving public SplitLocationInfo[] getLocationInfo() throws IOException
SplitLocationInfo
s describing how the split
data is stored at each location. A null value indicates that all the
locations have the data stored on disk.IOException
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