org.apache.hadoop.tools.dynamometer.workloadgenerator

Class VirtualInputFormat<K,V>

java.lang.Object

org.apache.hadoop.mapreduce.InputFormat<K,V>

org.apache.hadoop.mapreduce.lib.input.FileInputFormat<K,V>

org.apache.hadoop.tools.dynamometer.workloadgenerator.VirtualInputFormat<K,V>

public class VirtualInputFormat<K,V>
extends org.apache.hadoop.mapreduce.lib.input.FileInputFormat<K,V>

An input format which does not read any input, but rather starts a configurable number of mappers and runs them for a configurable duration.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

org.apache.hadoop.mapreduce.lib.input.FileInputFormat.Counter

Field Summary

Fields inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

DEFAULT_LIST_STATUS_NUM_THREADS, INPUT_DIR, INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS, INPUT_DIR_RECURSIVE, LIST_STATUS_NUM_THREADS, NUM_INPUT_FILES, PATHFILTER_CLASS, SPLIT_MAXSIZE, SPLIT_MINSIZE

Constructor Summary

Constructors

Constructor and Description
VirtualInputFormat()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.mapreduce.RecordReader<K,V>	createRecordReader(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)
List<org.apache.hadoop.mapreduce.InputSplit>	getSplits(org.apache.hadoop.mapreduce.JobContext job)

Methods inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

addInputPath, addInputPathRecursively, addInputPaths, computeSplitSize, getBlockIndex, getFormatMinSplitSize, getInputDirRecursive, getInputPathFilter, getInputPaths, getMaxSplitSize, getMinSplitSize, isSplitable, listStatus, makeSplit, makeSplit, setInputDirRecursive, setInputPathFilter, setInputPaths, setInputPaths, setMaxInputSplitSize, setMinInputSplitSize

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VirtualInputFormat

public VirtualInputFormat()

Method Detail

getSplits

public List<org.apache.hadoop.mapreduce.InputSplit> getSplits(org.apache.hadoop.mapreduce.JobContext job)
                                                       throws IOException

Overrides:

getSplits in class org.apache.hadoop.mapreduce.lib.input.FileInputFormat<K,V>

Throws:

IOException

createRecordReader

public org.apache.hadoop.mapreduce.RecordReader<K,V> createRecordReader(org.apache.hadoop.mapreduce.InputSplit split,
                                                                        org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                                 throws IOException,
                                                                        InterruptedException

Specified by:

createRecordReader in class org.apache.hadoop.mapreduce.InputFormat<K,V>

Throws:

IOException

InterruptedException