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MAPREDUCE-5399. Unnecessary Configuration instantiation in IFileInputStream slows down merge. (Stanislav Barton via Sandy Ryza) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1510811 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Sanford Ryza 2013-08-05 23:32:33 +00:00
parent 95f9a515aa
commit a00a729729
4 changed files with 13 additions and 5 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -647,6 +647,9 @@ Release 2.1.0-beta - 2013-08-06
MAPREDUCE-5419. TestSlive is getting FileNotFound Exception (Robert Parker MAPREDUCE-5419. TestSlive is getting FileNotFound Exception (Robert Parker
via jlowe) via jlowe)
MAPREDUCE-5399. Unnecessary Configuration instantiation in IFileInputStream
slows down merge. (Stanislav Barton via Sandy Ryza)
BREAKDOWN OF HADOOP-8562 SUBTASKS BREAKDOWN OF HADOOP-8562 SUBTASKS
MAPREDUCE-4739. Some MapReduce tests fail to find winutils. MAPREDUCE-4739. Some MapReduce tests fail to find winutils.

6
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/BackupStore.java
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@ -82,6 +82,8 @@ public class BackupStore<K,V> {
private boolean clearMarkFlag = false; private boolean clearMarkFlag = false;
private boolean lastSegmentEOF = false; private boolean lastSegmentEOF = false;
private Configuration conf;
public BackupStore(Configuration conf, TaskAttemptID taskid) public BackupStore(Configuration conf, TaskAttemptID taskid)
throws IOException { throws IOException {
@ -106,6 +108,8 @@ public BackupStore(Configuration conf, TaskAttemptID taskid)
fileCache = new FileCache(conf); fileCache = new FileCache(conf);
tid = taskid; tid = taskid;
this.conf = conf;
LOG.info("Created a new BackupStore with a memory of " + maxSize); LOG.info("Created a new BackupStore with a memory of " + maxSize);
} }
@ -500,7 +504,7 @@ void createInMemorySegment () throws IOException {
Reader<K, V> reader = Reader<K, V> reader =
new org.apache.hadoop.mapreduce.task.reduce.InMemoryReader<K, V>(null, new org.apache.hadoop.mapreduce.task.reduce.InMemoryReader<K, V>(null,
(org.apache.hadoop.mapred.TaskAttemptID) tid, (org.apache.hadoop.mapred.TaskAttemptID) tid,
dataOut.getData(), 0, usedSize); dataOut.getData(), 0, usedSize, conf);
Segment<K, V> segment = new Segment<K, V>(reader, false); Segment<K, V> segment = new Segment<K, V>(reader, false);
segmentList.add(segment); segmentList.add(segment);
LOG.debug("Added Memory Segment to List. List Size is " + LOG.debug("Added Memory Segment to List. List Size is " +

5
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/InMemoryReader.java
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@ -24,6 +24,7 @@
import org.apache.hadoop.classification.InterfaceAudience; import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability; import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.DataInputBuffer; import org.apache.hadoop.io.DataInputBuffer;
import org.apache.hadoop.mapred.IFile.Reader; import org.apache.hadoop.mapred.IFile.Reader;
import org.apache.hadoop.mapreduce.TaskAttemptID; import org.apache.hadoop.mapreduce.TaskAttemptID;
@ -41,9 +42,9 @@ public class InMemoryReader<K, V> extends Reader<K, V> {
private int length; private int length;
public InMemoryReader(MergeManagerImpl<K,V> merger, TaskAttemptID taskAttemptId, public InMemoryReader(MergeManagerImpl<K,V> merger, TaskAttemptID taskAttemptId,
byte[] data, int start, int length) byte[] data, int start, int length, Configuration conf)
throws IOException { throws IOException {
super(null, null, length - start, null, null); super(conf, null, length - start, null, null);
this.merger = merger; this.merger = merger;
this.taskAttemptId = taskAttemptId; this.taskAttemptId = taskAttemptId;

2
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/MergeManagerImpl.java
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@ -613,7 +613,7 @@ private long createInMemorySegments(List<InMemoryMapOutput<K,V>> inMemoryMapOutp
fullSize -= size; fullSize -= size;
Reader<K,V> reader = new InMemoryReader<K,V>(MergeManagerImpl.this, Reader<K,V> reader = new InMemoryReader<K,V>(MergeManagerImpl.this,
mo.getMapId(), mo.getMapId(),
data, 0, (int)size); data, 0, (int)size, jobConf);
inMemorySegments.add(new Segment<K,V>(reader, true, inMemorySegments.add(new Segment<K,V>(reader, true,
(mo.isPrimaryMapOutput() ? (mo.isPrimaryMapOutput() ?
mergedMapOutputsCounter : null))); mergedMapOutputsCounter : null)));