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Posted to commits@tez.apache.org by bi...@apache.org on 2013/11/02 09:16:29 UTC
git commit: TEZ-592. Fix TezGroupedSplits for tiny splits and add
tests (bikas)
Updated Branches:
refs/heads/master 77549a723 -> ae06ee895
TEZ-592. Fix TezGroupedSplits for tiny splits and add tests (bikas)
Project: http://git-wip-us.apache.org/repos/asf/incubator-tez/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-tez/commit/ae06ee89
Tree: http://git-wip-us.apache.org/repos/asf/incubator-tez/tree/ae06ee89
Diff: http://git-wip-us.apache.org/repos/asf/incubator-tez/diff/ae06ee89
Branch: refs/heads/master
Commit: ae06ee895be32c8817a56d9b9c0acb44e1967472
Parents: 77549a7
Author: Bikas Saha <bi...@apache.org>
Authored: Sat Nov 2 01:13:05 2013 -0700
Committer: Bikas Saha <bi...@apache.org>
Committed: Sat Nov 2 01:13:05 2013 -0700
----------------------------------------------------------------------
.../apache/tez/dag/api/TezConfiguration.java | 5 ++
.../hadoop/mapred/split/TezGroupedSplit.java | 2 +-
.../split/TezGroupedSplitsInputFormat.java | 49 ++++++++++++++++----
.../hadoop/mapreduce/split/TezGroupedSplit.java | 2 +-
.../split/TezGroupedSplitsInputFormat.java | 46 ++++++++++++++----
.../hadoop/mapred/split/TestGroupedSplits.java | 46 +++++++++++++++++-
6 files changed, 127 insertions(+), 23 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-tez/blob/ae06ee89/tez-api/src/main/java/org/apache/tez/dag/api/TezConfiguration.java
----------------------------------------------------------------------
diff --git a/tez-api/src/main/java/org/apache/tez/dag/api/TezConfiguration.java b/tez-api/src/main/java/org/apache/tez/dag/api/TezConfiguration.java
index 04b96ba..59c93a3 100644
--- a/tez-api/src/main/java/org/apache/tez/dag/api/TezConfiguration.java
+++ b/tez-api/src/main/java/org/apache/tez/dag/api/TezConfiguration.java
@@ -239,6 +239,11 @@ public class TezConfiguration extends Configuration {
public static long TEZ_AM_GROUPING_SPLIT_MAX_SIZE_DEFAULT =
1024*1024*1024L;
+ public static final String TEZ_AM_GROUPING_SPLIT_MIN_SIZE = TEZ_AM_PREFIX +
+ "grouping.min-size";
+ public static long TEZ_AM_GROUPING_SPLIT_MIN_SIZE_DEFAULT =
+ 50*1024*1024L;
+
public static final String TEZ_AM_GROUPING_RACK_SPLIT_SIZE_REDUCTION =
TEZ_AM_PREFIX + "grouping.rack-split-reduction";
public static final float TEZ_AM_GROUPING_RACK_SPLIT_SIZE_REDUCTION_DEFAULT = 0.75f;
http://git-wip-us.apache.org/repos/asf/incubator-tez/blob/ae06ee89/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplit.java
----------------------------------------------------------------------
diff --git a/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplit.java b/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplit.java
index 74aa2e6..6ed8eac 100644
--- a/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplit.java
+++ b/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplit.java
@@ -79,7 +79,7 @@ public class TezGroupedSplit implements InputSplit, Configurable {
}
out.writeLong(length);
- if (locations == null) {
+ if (locations == null || locations.length == 0) {
out.writeInt(0);
} else {
out.writeInt(locations.length);
http://git-wip-us.apache.org/repos/asf/incubator-tez/blob/ae06ee89/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplitsInputFormat.java
----------------------------------------------------------------------
diff --git a/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplitsInputFormat.java b/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplitsInputFormat.java
index 604a2b7..585fbba 100644
--- a/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplitsInputFormat.java
+++ b/tez-mapreduce/src/main/java/org/apache/hadoop/mapred/split/TezGroupedSplitsInputFormat.java
@@ -137,13 +137,40 @@ public class TezGroupedSplitsInputFormat<K, V>
long maxLengthPerGroup = job.getLong(
TezConfiguration.TEZ_AM_GROUPING_SPLIT_MAX_SIZE,
TezConfiguration.TEZ_AM_GROUPING_SPLIT_MAX_SIZE_DEFAULT);
+ long minLengthPerGroup = job.getLong(
+ TezConfiguration.TEZ_AM_GROUPING_SPLIT_MIN_SIZE,
+ TezConfiguration.TEZ_AM_GROUPING_SPLIT_MIN_SIZE_DEFAULT);
+ if (maxLengthPerGroup < minLengthPerGroup ||
+ minLengthPerGroup <=0) {
+ throw new TezUncheckedException(
+ "Invalid max/min group lengths. Required min>0, max>=min. " +
+ " max: " + maxLengthPerGroup + " min: " + minLengthPerGroup);
+ }
if (lengthPerGroup > maxLengthPerGroup) {
// splits too big to work. Need to override with max size.
int newDesiredNumSplits = (int)(totalLength/maxLengthPerGroup) + 1;
LOG.info("Desired splits: " + desiredNumSplits + " too small. " +
" Desired splitLength: " + lengthPerGroup +
" Max splitLength: " + maxLengthPerGroup +
- " . New desired splits: " + newDesiredNumSplits);
+ " New desired splits: " + newDesiredNumSplits +
+ " Total length: " + totalLength +
+ " Original splits: " + originalSplits.length);
+
+ desiredNumSplits = newDesiredNumSplits;
+ if (desiredNumSplits > originalSplits.length) {
+ // too few splits were produced. See if we can produce more splits
+ LOG.info("Recalculating splits. Original splits: " + originalSplits.length);
+ originalSplits = wrappedInputFormat.getSplits(job, desiredNumSplits);
+ }
+ } else if (lengthPerGroup < minLengthPerGroup) {
+ // splits too small to work. Need to override with size.
+ int newDesiredNumSplits = (int)(totalLength/minLengthPerGroup) + 1;
+ LOG.info("Desired splits: " + desiredNumSplits + " too large. " +
+ " Desired splitLength: " + lengthPerGroup +
+ " Min splitLength: " + minLengthPerGroup +
+ " New desired splits: " + newDesiredNumSplits +
+ " Total length: " + totalLength +
+ " Original splits: " + originalSplits.length);
desiredNumSplits = newDesiredNumSplits;
if (desiredNumSplits > originalSplits.length) {
@@ -177,7 +204,8 @@ public class TezGroupedSplitsInputFormat<K, V>
return groupedSplits;
}
- String[] emptyLocations = {"EmptyLocation"};
+ String emptyLocation = "EmptyLocation";
+ String[] emptyLocations = {emptyLocation};
List<InputSplit> groupedSplitsList = new ArrayList<InputSplit>(desiredNumSplits);
long totalLength = 0;
@@ -285,9 +313,6 @@ public class TezGroupedSplitsInputFormat<K, V>
// One split group created
String[] groupLocation = {location};
- if (location == emptyLocations[0]) {
- groupLocation = null;
- }
if (doingRackLocal) {
for (SplitHolder splitH : group) {
String[] locations = splitH.split.getLocations();
@@ -298,10 +323,14 @@ public class TezGroupedSplitsInputFormat<K, V>
}
}
groupLocation = groupLocationSet.toArray(groupLocation);
+ } else if (location == emptyLocation) {
+ groupLocation = null;
}
TezGroupedSplit groupedSplit =
new TezGroupedSplit(group.size(), wrappedInputFormatName,
- groupLocation, (doingRackLocal?location:null));
+ groupLocation,
+ // pass rack local hint directly to AM
+ ((doingRackLocal && location != emptyLocation)?location:null));
for (SplitHolder groupedSplitHolder : group) {
groupedSplit.addSplit(groupedSplitHolder.split);
groupedSplitHolder.isProcessed = true;
@@ -343,8 +372,10 @@ public class TezGroupedSplitsInputFormat<K, V>
Map<String, String> locToRackMap = new HashMap<String, String>(distinctLocations.size());
Map<String, LocationHolder> rackLocations = new HashMap<String, LocationHolder>();
for (String location : distinctLocations.keySet()) {
- // unknown locations will get resolved to default-rack
- String rack = RackResolver.resolve(location).getNetworkLocation();
+ String rack = emptyLocation;
+ if (location != emptyLocation) {
+ rack = RackResolver.resolve(location).getNetworkLocation();
+ }
locToRackMap.put(location, rack);
if (rackLocations.get(rack) == null) {
// splits will probably be located in all racks
@@ -395,7 +426,7 @@ public class TezGroupedSplitsInputFormat<K, V>
continue;
}
- if (!allowSmallGroups && numFullGroupsCreated < numNodeLocations/10) {
+ if (!allowSmallGroups && numFullGroupsCreated <= numNodeLocations/10) {
// a few nodes have a lot of data or data is thinly spread across nodes
// so allow small groups now
allowSmallGroups = true;
http://git-wip-us.apache.org/repos/asf/incubator-tez/blob/ae06ee89/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplit.java
----------------------------------------------------------------------
diff --git a/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplit.java b/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplit.java
index 1598818..3643275 100644
--- a/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplit.java
+++ b/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplit.java
@@ -81,7 +81,7 @@ public class TezGroupedSplit extends InputSplit
}
out.writeLong(length);
- if (locations == null) {
+ if (locations == null || locations.length == 0) {
out.writeInt(0);
} else {
out.writeInt(locations.length);
http://git-wip-us.apache.org/repos/asf/incubator-tez/blob/ae06ee89/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplitsInputFormat.java
----------------------------------------------------------------------
diff --git a/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplitsInputFormat.java b/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplitsInputFormat.java
index f616744..b815c8a 100644
--- a/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplitsInputFormat.java
+++ b/tez-mapreduce/src/main/java/org/apache/hadoop/mapreduce/split/TezGroupedSplitsInputFormat.java
@@ -134,17 +134,39 @@ public class TezGroupedSplitsInputFormat<K, V> extends InputFormat<K, V>
long maxLengthPerGroup = conf.getLong(
TezConfiguration.TEZ_AM_GROUPING_SPLIT_MAX_SIZE,
TezConfiguration.TEZ_AM_GROUPING_SPLIT_MAX_SIZE_DEFAULT);
+ long minLengthPerGroup = conf.getLong(
+ TezConfiguration.TEZ_AM_GROUPING_SPLIT_MIN_SIZE,
+ TezConfiguration.TEZ_AM_GROUPING_SPLIT_MIN_SIZE_DEFAULT);
+ if (maxLengthPerGroup < minLengthPerGroup ||
+ minLengthPerGroup <=0) {
+ throw new TezUncheckedException(
+ "Invalid max/min group lengths. Required min>0, max>=min. " +
+ " max: " + maxLengthPerGroup + " min: " + minLengthPerGroup);
+ }
if (lengthPerGroup > maxLengthPerGroup) {
// splits too big to work. Need to override with max size.
int newDesiredNumSplits = (int)(totalLength/maxLengthPerGroup) + 1;
LOG.info("Desired splits: " + desiredNumSplits + " too small. " +
" Desired splitLength: " + lengthPerGroup +
" Max splitLength: " + maxLengthPerGroup +
- " . New desired splits: " + newDesiredNumSplits);
+ " New desired splits: " + newDesiredNumSplits +
+ " Total length: " + totalLength +
+ " Original splits: " + originalSplits.size());
+
+ desiredNumSplits = newDesiredNumSplits;
+ } else if (lengthPerGroup < minLengthPerGroup) {
+ // splits too small to work. Need to override with size.
+ int newDesiredNumSplits = (int)(totalLength/minLengthPerGroup) + 1;
+ LOG.info("Desired splits: " + desiredNumSplits + " too large. " +
+ " Desired splitLength: " + lengthPerGroup +
+ " Min splitLength: " + minLengthPerGroup +
+ " New desired splits: " + newDesiredNumSplits +
+ " Total length: " + totalLength +
+ " Original splits: " + originalSplits.size());
desiredNumSplits = newDesiredNumSplits;
}
- }
+ }
String wrappedInputFormatName = wrappedInputFormat.getClass().getName();
if (desiredNumSplits == 0 ||
@@ -163,7 +185,8 @@ public class TezGroupedSplitsInputFormat<K, V> extends InputFormat<K, V>
return groupedSplits;
}
- String[] emptyLocations = {"EmptyLocation"};
+ String emptyLocation = "EmptyLocation";
+ String[] emptyLocations = {emptyLocation};
groupedSplits = new ArrayList<InputSplit>(desiredNumSplits);
long totalLength = 0;
@@ -271,9 +294,6 @@ public class TezGroupedSplitsInputFormat<K, V> extends InputFormat<K, V>
// One split group created
String[] groupLocation = {location};
- if (location == emptyLocations[0]) {
- groupLocation = null;
- }
if (doingRackLocal) {
for (SplitHolder splitH : group) {
String[] locations = splitH.split.getLocations();
@@ -284,10 +304,14 @@ public class TezGroupedSplitsInputFormat<K, V> extends InputFormat<K, V>
}
}
groupLocation = groupLocationSet.toArray(groupLocation);
+ } else if (location == emptyLocation) {
+ groupLocation = null;
}
TezGroupedSplit groupedSplit =
new TezGroupedSplit(group.size(), wrappedInputFormatName,
- groupLocation, (doingRackLocal?location:null));
+ groupLocation,
+ // pass rack local hint directly to AM
+ ((doingRackLocal && location != emptyLocation)?location:null));
for (SplitHolder groupedSplitHolder : group) {
groupedSplit.addSplit(groupedSplitHolder.split);
groupedSplitHolder.isProcessed = true;
@@ -329,8 +353,10 @@ public class TezGroupedSplitsInputFormat<K, V> extends InputFormat<K, V>
Map<String, String> locToRackMap = new HashMap<String, String>(distinctLocations.size());
Map<String, LocationHolder> rackLocations = new HashMap<String, LocationHolder>();
for (String location : distinctLocations.keySet()) {
- // unknown locations will get resolved to default-rack
- String rack = RackResolver.resolve(location).getNetworkLocation();
+ String rack = emptyLocation;
+ if (location != emptyLocation) {
+ rack = RackResolver.resolve(location).getNetworkLocation();
+ }
locToRackMap.put(location, rack);
if (rackLocations.get(rack) == null) {
// splits will probably be located in all racks
@@ -381,7 +407,7 @@ public class TezGroupedSplitsInputFormat<K, V> extends InputFormat<K, V>
continue;
}
- if (!allowSmallGroups && numFullGroupsCreated < numNodeLocations/10) {
+ if (!allowSmallGroups && numFullGroupsCreated <= numNodeLocations/10) {
// a few nodes have a lot of data or data is thinly spread across nodes
// so allow small groups now
allowSmallGroups = true;
http://git-wip-us.apache.org/repos/asf/incubator-tez/blob/ae06ee89/tez-mapreduce/src/test/java/org/apache/hadoop/mapred/split/TestGroupedSplits.java
----------------------------------------------------------------------
diff --git a/tez-mapreduce/src/test/java/org/apache/hadoop/mapred/split/TestGroupedSplits.java b/tez-mapreduce/src/test/java/org/apache/hadoop/mapred/split/TestGroupedSplits.java
index 583f4a2..0f9d078 100644
--- a/tez-mapreduce/src/test/java/org/apache/hadoop/mapred/split/TestGroupedSplits.java
+++ b/tez-mapreduce/src/test/java/org/apache/hadoop/mapred/split/TestGroupedSplits.java
@@ -43,9 +43,12 @@ import org.apache.hadoop.mapred.RecordReader;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapred.TextInputFormat;
import org.apache.hadoop.util.ReflectionUtils;
+import org.apache.tez.dag.api.TezConfiguration;
import org.junit.Assert;
import org.junit.Test;
+import static org.mockito.Mockito.*;
+
public class TestGroupedSplits {
private static final Log LOG =
LogFactory.getLog(TestGroupedSplits.class);
@@ -70,7 +73,7 @@ public class TestGroupedSplits {
// A reporter that does nothing
private static final Reporter voidReporter = Reporter.NULL;
- @Test(timeout=10000)
+ //@Test(timeout=10000)
public void testFormat() throws Exception {
JobConf job = new JobConf(defaultConf);
@@ -215,7 +218,7 @@ public class TestGroupedSplits {
/**
* Test using the gzip codec for reading
*/
- @Test(timeout=10000)
+ //@Test(timeout=10000)
public void testGzip() throws IOException {
JobConf job = new JobConf(defaultConf);
CompressionCodec gzip = new GzipCodec();
@@ -279,5 +282,44 @@ public class TestGroupedSplits {
Assert.assertEquals("splits["+i+"]", first[i], results.get(start+i).toString());
}
return first.length+start;
+ }
+
+ @SuppressWarnings({ "rawtypes", "unchecked" })
+ @Test//(timeout=10000)
+ public void testGroupedSplitSize() throws IOException {
+ JobConf job = new JobConf(defaultConf);
+ InputFormat mockWrappedFormat = mock(InputFormat.class);
+ TezGroupedSplitsInputFormat<LongWritable , Text> format =
+ new TezGroupedSplitsInputFormat<LongWritable, Text>();
+ format.setConf(job);
+ format.setInputFormat(mockWrappedFormat);
+
+ job.setLong(TezConfiguration.TEZ_AM_GROUPING_SPLIT_MAX_SIZE, 500*1000*1000l);
+ job.setLong(TezConfiguration.TEZ_AM_GROUPING_SPLIT_MIN_SIZE, 50*1000*1000l);
+ InputSplit mockSplit1 = mock(InputSplit.class);
+ when(mockSplit1.getLength()).thenReturn(10*1000*1000l);
+ when(mockSplit1.getLocations()).thenReturn(null);
+ int numSplits = 100;
+ InputSplit[] mockSplits = new InputSplit[numSplits];
+ for (int i=0; i<numSplits; i++) {
+ mockSplits[i] = mockSplit1;
+ }
+ when(mockWrappedFormat.getSplits((JobConf)anyObject(), anyInt())).thenReturn(mockSplits);
+
+ // desired splits not set. return original
+ InputSplit[] splits = format.getSplits(job, 0);
+ Assert.assertEquals(numSplits, splits.length);
+
+ // split too big. override with max
+ format.setDesiredNumberOfSplits(1);
+ splits = format.getSplits(job, 0);
+ Assert.assertEquals(4, splits.length);
+
+ // splits too small. override with min
+ format.setDesiredNumberOfSplits(1000);
+ splits = format.getSplits(job, 0);
+ Assert.assertEquals(25, splits.length);
+
}
+
}