/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
**********************************************************************************************************************/
package eu.stratosphere.pact.runtime.hash;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import eu.stratosphere.api.common.typeutils.TypeComparator;
import eu.stratosphere.api.common.typeutils.TypePairComparator;
import eu.stratosphere.api.common.typeutils.TypeSerializer;
import eu.stratosphere.core.memory.MemorySegment;
import eu.stratosphere.nephele.services.iomanager.IOManager;
import eu.stratosphere.nephele.services.memorymanager.MemoryAllocationException;
import eu.stratosphere.nephele.services.memorymanager.MemoryManager;
import eu.stratosphere.nephele.services.memorymanager.spi.DefaultMemoryManager;
import eu.stratosphere.nephele.template.AbstractInvokable;
import eu.stratosphere.pact.runtime.hash.MutableHashTable.HashBucketIterator;
import eu.stratosphere.api.java.typeutils.runtime.record.RecordComparator;
import eu.stratosphere.api.java.typeutils.runtime.record.RecordSerializer;
import eu.stratosphere.pact.runtime.test.util.DummyInvokable;
import eu.stratosphere.pact.runtime.test.util.UniformIntPairGenerator;
import eu.stratosphere.pact.runtime.test.util.UniformRecordGenerator;
import eu.stratosphere.pact.runtime.test.util.UnionIterator;
import eu.stratosphere.pact.runtime.test.util.types.IntPair;
import eu.stratosphere.pact.runtime.test.util.types.IntPairComparator;
import eu.stratosphere.pact.runtime.test.util.types.IntPairPairComparator;
import eu.stratosphere.pact.runtime.test.util.types.IntPairSerializer;
import eu.stratosphere.types.IntValue;
import eu.stratosphere.types.Key;
import eu.stratosphere.types.NullKeyFieldException;
import eu.stratosphere.types.Record;
import eu.stratosphere.util.MutableObjectIterator;
public class HashTableITCase {
private static final AbstractInvokable MEM_OWNER = new DummyInvokable();
private MemoryManager memManager;
private IOManager ioManager;
private TypeSerializer<Record> recordBuildSideAccesssor;
private TypeSerializer<Record> recordProbeSideAccesssor;
private TypeComparator<Record> recordBuildSideComparator;
private TypeComparator<Record> recordProbeSideComparator;
private TypePairComparator<Record, Record> pactRecordComparator;
private TypeSerializer<IntPair> pairBuildSideAccesssor;
private TypeSerializer<IntPair> pairProbeSideAccesssor;
private TypeComparator<IntPair> pairBuildSideComparator;
private TypeComparator<IntPair> pairProbeSideComparator;
private TypePairComparator<IntPair, IntPair> pairComparator;
@Before
public void setup()
{
final int[] keyPos = new int[] {0};
@SuppressWarnings("unchecked")
final Class<? extends Key<?>>[] keyType = (Class<? extends Key<?>>[]) new Class[] { IntValue.class };
this.recordBuildSideAccesssor = RecordSerializer.get();
this.recordProbeSideAccesssor = RecordSerializer.get();
this.recordBuildSideComparator = new RecordComparator(keyPos, keyType);
this.recordProbeSideComparator = new RecordComparator(keyPos, keyType);
this.pactRecordComparator = new RecordPairComparatorFirstInt();
this.pairBuildSideAccesssor = new IntPairSerializer();
this.pairProbeSideAccesssor = new IntPairSerializer();
this.pairBuildSideComparator = new IntPairComparator();
this.pairProbeSideComparator = new IntPairComparator();
this.pairComparator = new IntPairPairComparator();
this.memManager = new DefaultMemoryManager(32 * 1024 * 1024);
this.ioManager = new IOManager();
}
@After
public void tearDown()
{
// shut down I/O manager and Memory Manager and verify the correct shutdown
this.ioManager.shutdown();
if (!this.ioManager.isProperlyShutDown()) {
fail("I/O manager was not property shut down.");
}
if (!this.memManager.verifyEmpty()) {
fail("Not all memory was properly released to the memory manager --> Memory Leak.");
}
}
@Test
public void testIOBufferCountComputation()
{
assertEquals(1, MutableHashTable.getNumWriteBehindBuffers(32));
assertEquals(1, MutableHashTable.getNumWriteBehindBuffers(33));
assertEquals(1, MutableHashTable.getNumWriteBehindBuffers(40));
assertEquals(1, MutableHashTable.getNumWriteBehindBuffers(64));
assertEquals(1, MutableHashTable.getNumWriteBehindBuffers(127));
assertEquals(2, MutableHashTable.getNumWriteBehindBuffers(128));
assertEquals(2, MutableHashTable.getNumWriteBehindBuffers(129));
assertEquals(2, MutableHashTable.getNumWriteBehindBuffers(511));
assertEquals(3, MutableHashTable.getNumWriteBehindBuffers(512));
assertEquals(3, MutableHashTable.getNumWriteBehindBuffers(513));
assertEquals(3, MutableHashTable.getNumWriteBehindBuffers(2047));
assertEquals(4, MutableHashTable.getNumWriteBehindBuffers(2048));
assertEquals(4, MutableHashTable.getNumWriteBehindBuffers(2049));
assertEquals(4, MutableHashTable.getNumWriteBehindBuffers(8191));
assertEquals(5, MutableHashTable.getNumWriteBehindBuffers(8192));
assertEquals(5, MutableHashTable.getNumWriteBehindBuffers(8193));
assertEquals(5, MutableHashTable.getNumWriteBehindBuffers(32767));
assertEquals(6, MutableHashTable.getNumWriteBehindBuffers(32768));
assertEquals(6, MutableHashTable.getNumWriteBehindBuffers(Integer.MAX_VALUE));
}
@Test
public void testInMemoryMutableHashTable() throws IOException
{
final int NUM_KEYS = 100000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key
MutableObjectIterator<Record> buildInput = new UniformRecordGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<Record> probeInput = new UniformRecordGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// ----------------------------------------------------------------------------------------
final MutableHashTable<Record, Record> join = new MutableHashTable<Record, Record>(
this.recordBuildSideAccesssor, this.recordProbeSideAccesssor,
this.recordBuildSideComparator, this.recordProbeSideComparator, this.pactRecordComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
final Record recordReuse = new Record();
int numRecordsInJoinResult = 0;
while (join.nextRecord()) {
HashBucketIterator<Record, Record> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", NUM_KEYS * BUILD_VALS_PER_KEY * PROBE_VALS_PER_KEY, numRecordsInJoinResult);
join.close();
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
@Test
public void testSpillingHashJoinOneRecursionPerformance() throws IOException
{
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key
MutableObjectIterator<Record> buildInput = new UniformRecordGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<Record> probeInput = new UniformRecordGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// ----------------------------------------------------------------------------------------
final MutableHashTable<Record, Record> join = new MutableHashTable<Record, Record>(
this.recordBuildSideAccesssor, this.recordProbeSideAccesssor,
this.recordBuildSideComparator, this.recordProbeSideComparator, this.pactRecordComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
final Record recordReuse = new Record();
int numRecordsInJoinResult = 0;
while (join.nextRecord()) {
HashBucketIterator<Record, Record> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", NUM_KEYS * BUILD_VALS_PER_KEY * PROBE_VALS_PER_KEY, numRecordsInJoinResult);
join.close();
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
@Test
public void testSpillingHashJoinOneRecursionValidity() throws IOException
{
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key
MutableObjectIterator<Record> buildInput = new UniformRecordGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<Record> probeInput = new UniformRecordGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// create the map for validating the results
HashMap<Integer, Long> map = new HashMap<Integer, Long>(NUM_KEYS);
// ----------------------------------------------------------------------------------------
final MutableHashTable<Record, Record> join = new MutableHashTable<Record, Record>(
this.recordBuildSideAccesssor, this.recordProbeSideAccesssor,
this.recordBuildSideComparator, this.recordProbeSideComparator, this.pactRecordComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
Record record;
final Record recordReuse = new Record();
while (join.nextRecord())
{
int numBuildValues = 0;
int key = 0;
HashBucketIterator<Record, Record> buildSide = join.getBuildSideIterator();
if ((record = buildSide.next(recordReuse)) != null) {
numBuildValues = 1;
key = record.getField(0, IntValue.class).getValue();
}
else {
fail("No build side values found for a probe key.");
}
while ((record = buildSide.next(recordReuse)) != null) {
numBuildValues++;
}
if (numBuildValues != 3) {
fail("Other than 3 build values!!!");
}
Record pr = join.getCurrentProbeRecord();
Assert.assertEquals("Probe-side key was different than build-side key.", key, pr.getField(0, IntValue.class).getValue());
Long contained = map.get(key);
if (contained == null) {
contained = new Long(numBuildValues);
}
else {
contained = new Long(contained.longValue() + (numBuildValues));
}
map.put(key, contained);
}
join.close();
Assert.assertEquals("Wrong number of keys", NUM_KEYS, map.size());
for (Map.Entry<Integer, Long> entry : map.entrySet()) {
long val = entry.getValue();
int key = entry.getKey();
Assert.assertEquals("Wrong number of values in per-key cross product for key " + key,
PROBE_VALS_PER_KEY * BUILD_VALS_PER_KEY, val);
}
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
@Test
public void testSpillingHashJoinWithMassiveCollisions() throws IOException
{
// the following two values are known to have a hash-code collision on the initial level.
// we use them to make sure one partition grows over-proportionally large
final int REPEATED_VALUE_1 = 40559;
final int REPEATED_VALUE_2 = 92882;
final int REPEATED_VALUE_COUNT_BUILD = 200000;
final int REPEATED_VALUE_COUNT_PROBE = 5;
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key, plus 400k pairs with two colliding keys
MutableObjectIterator<Record> build1 = new UniformRecordGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
MutableObjectIterator<Record> build2 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_1, 17, REPEATED_VALUE_COUNT_BUILD);
MutableObjectIterator<Record> build3 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_2, 23, REPEATED_VALUE_COUNT_BUILD);
List<MutableObjectIterator<Record>> builds = new ArrayList<MutableObjectIterator<Record>>();
builds.add(build1);
builds.add(build2);
builds.add(build3);
MutableObjectIterator<Record> buildInput = new UnionIterator<Record>(builds);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<Record> probe1 = new UniformRecordGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
MutableObjectIterator<Record> probe2 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_1, 17, 5);
MutableObjectIterator<Record> probe3 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_2, 23, 5);
List<MutableObjectIterator<Record>> probes = new ArrayList<MutableObjectIterator<Record>>();
probes.add(probe1);
probes.add(probe2);
probes.add(probe3);
MutableObjectIterator<Record> probeInput = new UnionIterator<Record>(probes);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// create the map for validating the results
HashMap<Integer, Long> map = new HashMap<Integer, Long>(NUM_KEYS);
// ----------------------------------------------------------------------------------------
final MutableHashTable<Record, Record> join = new MutableHashTable<Record, Record>(
this.recordBuildSideAccesssor, this.recordProbeSideAccesssor,
this.recordBuildSideComparator, this.recordProbeSideComparator, this.pactRecordComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
Record record;
final Record recordReuse = new Record();
while (join.nextRecord())
{
int numBuildValues = 0;
final Record probeRec = join.getCurrentProbeRecord();
int key = probeRec.getField(0, IntValue.class).getValue();
HashBucketIterator<Record, Record> buildSide = join.getBuildSideIterator();
if ((record = buildSide.next(recordReuse)) != null) {
numBuildValues = 1;
Assert.assertEquals("Probe-side key was different than build-side key.", key, record.getField(0, IntValue.class).getValue());
}
else {
fail("No build side values found for a probe key.");
}
while ((record = buildSide.next(recordReuse)) != null) {
numBuildValues++;
Assert.assertEquals("Probe-side key was different than build-side key.", key, record.getField(0, IntValue.class).getValue());
}
Long contained = map.get(key);
if (contained == null) {
contained = new Long(numBuildValues);
}
else {
contained = new Long(contained.longValue() + numBuildValues);
}
map.put(key, contained);
}
join.close();
Assert.assertEquals("Wrong number of keys", NUM_KEYS, map.size());
for (Map.Entry<Integer, Long> entry : map.entrySet()) {
long val = entry.getValue();
int key = entry.getKey();
Assert.assertEquals("Wrong number of values in per-key cross product for key " + key,
(key == REPEATED_VALUE_1 || key == REPEATED_VALUE_2) ?
(PROBE_VALS_PER_KEY + REPEATED_VALUE_COUNT_PROBE) * (BUILD_VALS_PER_KEY + REPEATED_VALUE_COUNT_BUILD) :
PROBE_VALS_PER_KEY * BUILD_VALS_PER_KEY, val);
}
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
/*
* This test is basically identical to the "testSpillingHashJoinWithMassiveCollisions" test, only that the number
* of repeated values (causing bucket collisions) are large enough to make sure that their target partition no longer
* fits into memory by itself and needs to be repartitioned in the recursion again.
*/
@Test
public void testSpillingHashJoinWithTwoRecursions() throws IOException
{
// the following two values are known to have a hash-code collision on the first recursion level.
// we use them to make sure one partition grows over-proportionally large
final int REPEATED_VALUE_1 = 40559;
final int REPEATED_VALUE_2 = 92882;
final int REPEATED_VALUE_COUNT_BUILD = 200000;
final int REPEATED_VALUE_COUNT_PROBE = 5;
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key, plus 400k pairs with two colliding keys
MutableObjectIterator<Record> build1 = new UniformRecordGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
MutableObjectIterator<Record> build2 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_1, 17, REPEATED_VALUE_COUNT_BUILD);
MutableObjectIterator<Record> build3 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_2, 23, REPEATED_VALUE_COUNT_BUILD);
List<MutableObjectIterator<Record>> builds = new ArrayList<MutableObjectIterator<Record>>();
builds.add(build1);
builds.add(build2);
builds.add(build3);
MutableObjectIterator<Record> buildInput = new UnionIterator<Record>(builds);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<Record> probe1 = new UniformRecordGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
MutableObjectIterator<Record> probe2 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_1, 17, 5);
MutableObjectIterator<Record> probe3 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_2, 23, 5);
List<MutableObjectIterator<Record>> probes = new ArrayList<MutableObjectIterator<Record>>();
probes.add(probe1);
probes.add(probe2);
probes.add(probe3);
MutableObjectIterator<Record> probeInput = new UnionIterator<Record>(probes);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// create the map for validating the results
HashMap<Integer, Long> map = new HashMap<Integer, Long>(NUM_KEYS);
// ----------------------------------------------------------------------------------------
final MutableHashTable<Record, Record> join = new MutableHashTable<Record, Record>(
this.recordBuildSideAccesssor, this.recordProbeSideAccesssor,
this.recordBuildSideComparator, this.recordProbeSideComparator, this.pactRecordComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
Record record;
final Record recordReuse = new Record();
while (join.nextRecord())
{
int numBuildValues = 0;
final Record probeRec = join.getCurrentProbeRecord();
int key = probeRec.getField(0, IntValue.class).getValue();
HashBucketIterator<Record, Record> buildSide = join.getBuildSideIterator();
if ((record = buildSide.next(recordReuse)) != null) {
numBuildValues = 1;
Assert.assertEquals("Probe-side key was different than build-side key.", key, record.getField(0, IntValue.class).getValue());
}
else {
fail("No build side values found for a probe key.");
}
while ((record = buildSide.next(recordReuse)) != null) {
numBuildValues++;
Assert.assertEquals("Probe-side key was different than build-side key.", key, record.getField(0, IntValue.class).getValue());
}
Long contained = map.get(key);
if (contained == null) {
contained = new Long(numBuildValues);
}
else {
contained = new Long(contained.longValue() + numBuildValues);
}
map.put(key, contained);
}
join.close();
Assert.assertEquals("Wrong number of keys", NUM_KEYS, map.size());
for (Map.Entry<Integer, Long> entry : map.entrySet()) {
long val = entry.getValue();
int key = entry.getKey();
Assert.assertEquals("Wrong number of values in per-key cross product for key " + key,
(key == REPEATED_VALUE_1 || key == REPEATED_VALUE_2) ?
(PROBE_VALS_PER_KEY + REPEATED_VALUE_COUNT_PROBE) * (BUILD_VALS_PER_KEY + REPEATED_VALUE_COUNT_BUILD) :
PROBE_VALS_PER_KEY * BUILD_VALS_PER_KEY, val);
}
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
/*
* This test is basically identical to the "testSpillingHashJoinWithMassiveCollisions" test, only that the number
* of repeated values (causing bucket collisions) are large enough to make sure that their target partition no longer
* fits into memory by itself and needs to be repartitioned in the recursion again.
*/
@Test
public void testFailingHashJoinTooManyRecursions() throws IOException
{
// the following two values are known to have a hash-code collision on the first recursion level.
// we use them to make sure one partition grows over-proportionally large
final int REPEATED_VALUE_1 = 40559;
final int REPEATED_VALUE_2 = 92882;
final int REPEATED_VALUE_COUNT = 3000000;
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key, plus 400k pairs with two colliding keys
MutableObjectIterator<Record> build1 = new UniformRecordGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
MutableObjectIterator<Record> build2 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_1, 17, REPEATED_VALUE_COUNT);
MutableObjectIterator<Record> build3 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_2, 23, REPEATED_VALUE_COUNT);
List<MutableObjectIterator<Record>> builds = new ArrayList<MutableObjectIterator<Record>>();
builds.add(build1);
builds.add(build2);
builds.add(build3);
MutableObjectIterator<Record> buildInput = new UnionIterator<Record>(builds);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<Record> probe1 = new UniformRecordGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
MutableObjectIterator<Record> probe2 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_1, 17, REPEATED_VALUE_COUNT);
MutableObjectIterator<Record> probe3 = new ConstantsKeyValuePairsIterator(REPEATED_VALUE_2, 23, REPEATED_VALUE_COUNT);
List<MutableObjectIterator<Record>> probes = new ArrayList<MutableObjectIterator<Record>>();
probes.add(probe1);
probes.add(probe2);
probes.add(probe3);
MutableObjectIterator<Record> probeInput = new UnionIterator<Record>(probes);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// ----------------------------------------------------------------------------------------
final MutableHashTable<Record, Record> join = new MutableHashTable<Record, Record>(
this.recordBuildSideAccesssor, this.recordProbeSideAccesssor,
this.recordBuildSideComparator, this.recordProbeSideComparator, this.pactRecordComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
final Record recordReuse = new Record();
try {
while (join.nextRecord()) {
HashBucketIterator<Record, Record> buildSide = join.getBuildSideIterator();
if (buildSide.next(recordReuse) == null) {
fail("No build side values found for a probe key.");
}
while (buildSide.next(recordReuse) != null);
}
fail("Hash Join must have failed due to too many recursions.");
}
catch (Exception ex) {
// expected
}
join.close();
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
/*
* Spills build records, so that probe records are also spilled. But only so
* few probe records are used that some partitions remain empty.
*/
@Test
public void testSparseProbeSpilling() throws IOException, MemoryAllocationException
{
final int NUM_BUILD_KEYS = 1000000;
final int NUM_BUILD_VALS = 1;
final int NUM_PROBE_KEYS = 20;
final int NUM_PROBE_VALS = 1;
MutableObjectIterator<Record> buildInput = new UniformRecordGenerator(
NUM_BUILD_KEYS, NUM_BUILD_VALS, false);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 128);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
final MutableHashTable<Record, Record> join = new MutableHashTable<Record, Record>(
this.recordBuildSideAccesssor, this.recordProbeSideAccesssor,
this.recordBuildSideComparator, this.recordProbeSideComparator, this.pactRecordComparator,
memSegments, ioManager);
join.open(buildInput, new UniformRecordGenerator(NUM_PROBE_KEYS, NUM_PROBE_VALS, true));
int expectedNumResults = (Math.min(NUM_PROBE_KEYS, NUM_BUILD_KEYS) * NUM_BUILD_VALS)
* NUM_PROBE_VALS;
final Record recordReuse = new Record();
int numRecordsInJoinResult = 0;
while (join.nextRecord()) {
HashBucketIterator<Record, Record> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", expectedNumResults, numRecordsInJoinResult);
join.close();
this.memManager.release(join.getFreedMemory());
}
/*
* This test validates a bug fix against former memory loss in the case where a partition was spilled
* during an insert into the same.
*/
@Test
public void validateSpillingDuringInsertion() throws IOException, MemoryAllocationException
{
final int NUM_BUILD_KEYS = 500000;
final int NUM_BUILD_VALS = 1;
final int NUM_PROBE_KEYS = 10;
final int NUM_PROBE_VALS = 1;
MutableObjectIterator<Record> buildInput = new UniformRecordGenerator(NUM_BUILD_KEYS, NUM_BUILD_VALS, false);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 85);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
final MutableHashTable<Record, Record> join = new MutableHashTable<Record, Record>(
this.recordBuildSideAccesssor, this.recordProbeSideAccesssor,
this.recordBuildSideComparator, this.recordProbeSideComparator, this.pactRecordComparator,
memSegments, ioManager);
join.open(buildInput, new UniformRecordGenerator(NUM_PROBE_KEYS, NUM_PROBE_VALS, true));
final Record recordReuse = new Record();
int numRecordsInJoinResult = 0;
int expectedNumResults = (Math.min(NUM_PROBE_KEYS, NUM_BUILD_KEYS) * NUM_BUILD_VALS)
* NUM_PROBE_VALS;
while (join.nextRecord()) {
HashBucketIterator<Record, Record> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", expectedNumResults, numRecordsInJoinResult);
join.close();
this.memManager.release(join.getFreedMemory());
}
// ============================================================================================
// Integer Pairs based Tests
// ============================================================================================
@Test
public void testInMemoryMutableHashTableIntPair() throws IOException
{
final int NUM_KEYS = 100000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key
MutableObjectIterator<IntPair> buildInput = new UniformIntPairGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<IntPair> probeInput = new UniformIntPairGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// create the I/O access for spilling
final IOManager ioManager = new IOManager();
// ----------------------------------------------------------------------------------------
final MutableHashTable<IntPair, IntPair> join = new MutableHashTable<IntPair, IntPair>(
this.pairBuildSideAccesssor, this.pairProbeSideAccesssor,
this.pairBuildSideComparator, this.pairProbeSideComparator, this.pairComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
final IntPair recordReuse = new IntPair();
int numRecordsInJoinResult = 0;
while (join.nextRecord()) {
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", NUM_KEYS * BUILD_VALS_PER_KEY * PROBE_VALS_PER_KEY, numRecordsInJoinResult);
join.close();
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
@Test
public void testSpillingHashJoinOneRecursionPerformanceIntPair() throws IOException
{
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key
MutableObjectIterator<IntPair> buildInput = new UniformIntPairGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<IntPair> probeInput = new UniformIntPairGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// ----------------------------------------------------------------------------------------
final MutableHashTable<IntPair, IntPair> join = new MutableHashTable<IntPair, IntPair>(
this.pairBuildSideAccesssor, this.pairProbeSideAccesssor,
this.pairBuildSideComparator, this.pairProbeSideComparator, this.pairComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
final IntPair recordReuse = new IntPair();
int numRecordsInJoinResult = 0;
while (join.nextRecord()) {
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", NUM_KEYS * BUILD_VALS_PER_KEY * PROBE_VALS_PER_KEY, numRecordsInJoinResult);
join.close();
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
@Test
public void testSpillingHashJoinOneRecursionValidityIntPair() throws IOException
{
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key
MutableObjectIterator<IntPair> buildInput = new UniformIntPairGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<IntPair> probeInput = new UniformIntPairGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// create the I/O access for spilling
IOManager ioManager = new IOManager();
// create the map for validating the results
HashMap<Integer, Long> map = new HashMap<Integer, Long>(NUM_KEYS);
// ----------------------------------------------------------------------------------------
final MutableHashTable<IntPair, IntPair> join = new MutableHashTable<IntPair, IntPair>(
this.pairBuildSideAccesssor, this.pairProbeSideAccesssor,
this.pairBuildSideComparator, this.pairProbeSideComparator, this.pairComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
IntPair record;
final IntPair recordReuse = new IntPair();
while (join.nextRecord())
{
int numBuildValues = 0;
int key = 0;
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
if ((record = buildSide.next(recordReuse)) != null) {
numBuildValues = 1;
key = record.getKey();
}
else {
fail("No build side values found for a probe key.");
}
while ((record = buildSide.next(recordReuse)) != null) {
numBuildValues++;
}
if (numBuildValues != 3) {
fail("Other than 3 build values!!!");
}
IntPair pr = join.getCurrentProbeRecord();
Assert.assertEquals("Probe-side key was different than build-side key.", key, pr.getKey());
Long contained = map.get(key);
if (contained == null) {
contained = new Long(numBuildValues);
}
else {
contained = new Long(contained.longValue() + (numBuildValues));
}
map.put(key, contained);
}
join.close();
Assert.assertEquals("Wrong number of keys", NUM_KEYS, map.size());
for (Map.Entry<Integer, Long> entry : map.entrySet()) {
long val = entry.getValue();
int key = entry.getKey();
Assert.assertEquals("Wrong number of values in per-key cross product for key " + key,
PROBE_VALS_PER_KEY * BUILD_VALS_PER_KEY, val);
}
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
@Test
public void testSpillingHashJoinWithMassiveCollisionsIntPair() throws IOException
{
// the following two values are known to have a hash-code collision on the initial level.
// we use them to make sure one partition grows over-proportionally large
final int REPEATED_VALUE_1 = 40559;
final int REPEATED_VALUE_2 = 92882;
final int REPEATED_VALUE_COUNT_BUILD = 200000;
final int REPEATED_VALUE_COUNT_PROBE = 5;
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key, plus 400k pairs with two colliding keys
MutableObjectIterator<IntPair> build1 = new UniformIntPairGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
MutableObjectIterator<IntPair> build2 = new ConstantsIntPairsIterator(REPEATED_VALUE_1, 17, REPEATED_VALUE_COUNT_BUILD);
MutableObjectIterator<IntPair> build3 = new ConstantsIntPairsIterator(REPEATED_VALUE_2, 23, REPEATED_VALUE_COUNT_BUILD);
List<MutableObjectIterator<IntPair>> builds = new ArrayList<MutableObjectIterator<IntPair>>();
builds.add(build1);
builds.add(build2);
builds.add(build3);
MutableObjectIterator<IntPair> buildInput = new UnionIterator<IntPair>(builds);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<IntPair> probe1 = new UniformIntPairGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
MutableObjectIterator<IntPair> probe2 = new ConstantsIntPairsIterator(REPEATED_VALUE_1, 17, 5);
MutableObjectIterator<IntPair> probe3 = new ConstantsIntPairsIterator(REPEATED_VALUE_2, 23, 5);
List<MutableObjectIterator<IntPair>> probes = new ArrayList<MutableObjectIterator<IntPair>>();
probes.add(probe1);
probes.add(probe2);
probes.add(probe3);
MutableObjectIterator<IntPair> probeInput = new UnionIterator<IntPair>(probes);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// create the I/O access for spilling
IOManager ioManager = new IOManager();
// create the map for validating the results
HashMap<Integer, Long> map = new HashMap<Integer, Long>(NUM_KEYS);
// ----------------------------------------------------------------------------------------
final MutableHashTable<IntPair, IntPair> join = new MutableHashTable<IntPair, IntPair>(
this.pairBuildSideAccesssor, this.pairProbeSideAccesssor,
this.pairBuildSideComparator, this.pairProbeSideComparator, this.pairComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
IntPair record;
final IntPair recordReuse = new IntPair();
while (join.nextRecord())
{
int numBuildValues = 0;
final IntPair probeRec = join.getCurrentProbeRecord();
int key = probeRec.getKey();
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
if ((record = buildSide.next(recordReuse)) != null) {
numBuildValues = 1;
Assert.assertEquals("Probe-side key was different than build-side key.", key, record.getKey());
}
else {
fail("No build side values found for a probe key.");
}
while ((record = buildSide.next(recordReuse)) != null) {
numBuildValues++;
Assert.assertEquals("Probe-side key was different than build-side key.", key, record.getKey());
}
Long contained = map.get(key);
if (contained == null) {
contained = new Long(numBuildValues);
}
else {
contained = new Long(contained.longValue() + numBuildValues);
}
map.put(key, contained);
}
join.close();
Assert.assertEquals("Wrong number of keys", NUM_KEYS, map.size());
for (Map.Entry<Integer, Long> entry : map.entrySet()) {
long val = entry.getValue();
int key = entry.getKey();
Assert.assertEquals("Wrong number of values in per-key cross product for key " + key,
(key == REPEATED_VALUE_1 || key == REPEATED_VALUE_2) ?
(PROBE_VALS_PER_KEY + REPEATED_VALUE_COUNT_PROBE) * (BUILD_VALS_PER_KEY + REPEATED_VALUE_COUNT_BUILD) :
PROBE_VALS_PER_KEY * BUILD_VALS_PER_KEY, val);
}
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
/*
* This test is basically identical to the "testSpillingHashJoinWithMassiveCollisions" test, only that the number
* of repeated values (causing bucket collisions) are large enough to make sure that their target partition no longer
* fits into memory by itself and needs to be repartitioned in the recursion again.
*/
@Test
public void testSpillingHashJoinWithTwoRecursionsIntPair() throws IOException
{
// the following two values are known to have a hash-code collision on the first recursion level.
// we use them to make sure one partition grows over-proportionally large
final int REPEATED_VALUE_1 = 40559;
final int REPEATED_VALUE_2 = 92882;
final int REPEATED_VALUE_COUNT_BUILD = 200000;
final int REPEATED_VALUE_COUNT_PROBE = 5;
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key, plus 400k pairs with two colliding keys
MutableObjectIterator<IntPair> build1 = new UniformIntPairGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
MutableObjectIterator<IntPair> build2 = new ConstantsIntPairsIterator(REPEATED_VALUE_1, 17, REPEATED_VALUE_COUNT_BUILD);
MutableObjectIterator<IntPair> build3 = new ConstantsIntPairsIterator(REPEATED_VALUE_2, 23, REPEATED_VALUE_COUNT_BUILD);
List<MutableObjectIterator<IntPair>> builds = new ArrayList<MutableObjectIterator<IntPair>>();
builds.add(build1);
builds.add(build2);
builds.add(build3);
MutableObjectIterator<IntPair> buildInput = new UnionIterator<IntPair>(builds);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<IntPair> probe1 = new UniformIntPairGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
MutableObjectIterator<IntPair> probe2 = new ConstantsIntPairsIterator(REPEATED_VALUE_1, 17, 5);
MutableObjectIterator<IntPair> probe3 = new ConstantsIntPairsIterator(REPEATED_VALUE_2, 23, 5);
List<MutableObjectIterator<IntPair>> probes = new ArrayList<MutableObjectIterator<IntPair>>();
probes.add(probe1);
probes.add(probe2);
probes.add(probe3);
MutableObjectIterator<IntPair> probeInput = new UnionIterator<IntPair>(probes);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// create the map for validating the results
HashMap<Integer, Long> map = new HashMap<Integer, Long>(NUM_KEYS);
// ----------------------------------------------------------------------------------------
final MutableHashTable<IntPair, IntPair> join = new MutableHashTable<IntPair, IntPair>(
this.pairBuildSideAccesssor, this.pairProbeSideAccesssor,
this.pairBuildSideComparator, this.pairProbeSideComparator, this.pairComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
IntPair record;
final IntPair recordReuse = new IntPair();
while (join.nextRecord())
{
int numBuildValues = 0;
final IntPair probeRec = join.getCurrentProbeRecord();
int key = probeRec.getKey();
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
if ((record = buildSide.next(recordReuse)) != null) {
numBuildValues = 1;
Assert.assertEquals("Probe-side key was different than build-side key.", key, record.getKey());
}
else {
fail("No build side values found for a probe key.");
}
while ((record = buildSide.next(recordReuse)) != null) {
numBuildValues++;
Assert.assertEquals("Probe-side key was different than build-side key.", key, record.getKey());
}
Long contained = map.get(key);
if (contained == null) {
contained = new Long(numBuildValues);
}
else {
contained = new Long(contained.longValue() + numBuildValues);
}
map.put(key, contained);
}
join.close();
Assert.assertEquals("Wrong number of keys", NUM_KEYS, map.size());
for (Map.Entry<Integer, Long> entry : map.entrySet()) {
long val = entry.getValue();
int key = entry.getKey();
Assert.assertEquals("Wrong number of values in per-key cross product for key " + key,
(key == REPEATED_VALUE_1 || key == REPEATED_VALUE_2) ?
(PROBE_VALS_PER_KEY + REPEATED_VALUE_COUNT_PROBE) * (BUILD_VALS_PER_KEY + REPEATED_VALUE_COUNT_BUILD) :
PROBE_VALS_PER_KEY * BUILD_VALS_PER_KEY, val);
}
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
/*
* This test is basically identical to the "testSpillingHashJoinWithMassiveCollisions" test, only that the number
* of repeated values (causing bucket collisions) are large enough to make sure that their target partition no longer
* fits into memory by itself and needs to be repartitioned in the recursion again.
*/
@Test
public void testFailingHashJoinTooManyRecursionsIntPair() throws IOException
{
// the following two values are known to have a hash-code collision on the first recursion level.
// we use them to make sure one partition grows over-proportionally large
final int REPEATED_VALUE_1 = 40559;
final int REPEATED_VALUE_2 = 92882;
final int REPEATED_VALUE_COUNT = 3000000;
final int NUM_KEYS = 1000000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key, plus 400k pairs with two colliding keys
MutableObjectIterator<IntPair> build1 = new UniformIntPairGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
MutableObjectIterator<IntPair> build2 = new ConstantsIntPairsIterator(REPEATED_VALUE_1, 17, REPEATED_VALUE_COUNT);
MutableObjectIterator<IntPair> build3 = new ConstantsIntPairsIterator(REPEATED_VALUE_2, 23, REPEATED_VALUE_COUNT);
List<MutableObjectIterator<IntPair>> builds = new ArrayList<MutableObjectIterator<IntPair>>();
builds.add(build1);
builds.add(build2);
builds.add(build3);
MutableObjectIterator<IntPair> buildInput = new UnionIterator<IntPair>(builds);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<IntPair> probe1 = new UniformIntPairGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
MutableObjectIterator<IntPair> probe2 = new ConstantsIntPairsIterator(REPEATED_VALUE_1, 17, REPEATED_VALUE_COUNT);
MutableObjectIterator<IntPair> probe3 = new ConstantsIntPairsIterator(REPEATED_VALUE_2, 23, REPEATED_VALUE_COUNT);
List<MutableObjectIterator<IntPair>> probes = new ArrayList<MutableObjectIterator<IntPair>>();
probes.add(probe1);
probes.add(probe2);
probes.add(probe3);
MutableObjectIterator<IntPair> probeInput = new UnionIterator<IntPair>(probes);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// ----------------------------------------------------------------------------------------
final MutableHashTable<IntPair, IntPair> join = new MutableHashTable<IntPair, IntPair>(
this.pairBuildSideAccesssor, this.pairProbeSideAccesssor,
this.pairBuildSideComparator, this.pairProbeSideComparator, this.pairComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
final IntPair recordReuse = new IntPair();
try {
while (join.nextRecord())
{
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
if (buildSide.next(recordReuse) == null) {
fail("No build side values found for a probe key.");
}
while (buildSide.next(recordReuse) != null);
}
fail("Hash Join must have failed due to too many recursions.");
}
catch (Exception ex) {
// expected
}
join.close();
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
/*
* Spills build records, so that probe records are also spilled. But only so
* few probe records are used that some partitions remain empty.
*/
@Test
public void testSparseProbeSpillingIntPair() throws IOException, MemoryAllocationException
{
final int NUM_BUILD_KEYS = 1000000;
final int NUM_BUILD_VALS = 1;
final int NUM_PROBE_KEYS = 20;
final int NUM_PROBE_VALS = 1;
MutableObjectIterator<IntPair> buildInput = new UniformIntPairGenerator(NUM_BUILD_KEYS, NUM_BUILD_VALS, false);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 128);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
final MutableHashTable<IntPair, IntPair> join = new MutableHashTable<IntPair, IntPair>(
this.pairBuildSideAccesssor, this.pairProbeSideAccesssor,
this.pairBuildSideComparator, this.pairProbeSideComparator, this.pairComparator,
memSegments, ioManager);
join.open(buildInput, new UniformIntPairGenerator(NUM_PROBE_KEYS, NUM_PROBE_VALS, true));
int expectedNumResults = (Math.min(NUM_PROBE_KEYS, NUM_BUILD_KEYS) * NUM_BUILD_VALS)
* NUM_PROBE_VALS;
final IntPair recordReuse = new IntPair();
int numRecordsInJoinResult = 0;
while (join.nextRecord()) {
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", expectedNumResults, numRecordsInJoinResult);
join.close();
this.memManager.release(join.getFreedMemory());
}
/*
* This test validates a bug fix against former memory loss in the case where a partition was spilled
* during an insert into the same.
*/
@Test
public void validateSpillingDuringInsertionIntPair() throws IOException, MemoryAllocationException
{
final int NUM_BUILD_KEYS = 500000;
final int NUM_BUILD_VALS = 1;
final int NUM_PROBE_KEYS = 10;
final int NUM_PROBE_VALS = 1;
MutableObjectIterator<IntPair> buildInput = new UniformIntPairGenerator(NUM_BUILD_KEYS, NUM_BUILD_VALS, false);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 85);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
final MutableHashTable<IntPair, IntPair> join = new MutableHashTable<IntPair, IntPair>(
this.pairBuildSideAccesssor, this.pairProbeSideAccesssor,
this.pairBuildSideComparator, this.pairProbeSideComparator, this.pairComparator,
memSegments, ioManager);
join.open(buildInput, new UniformIntPairGenerator(NUM_PROBE_KEYS, NUM_PROBE_VALS, true));
final IntPair recordReuse = new IntPair();
int numRecordsInJoinResult = 0;
int expectedNumResults = (Math.min(NUM_PROBE_KEYS, NUM_BUILD_KEYS) * NUM_BUILD_VALS)
* NUM_PROBE_VALS;
while (join.nextRecord()) {
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", expectedNumResults, numRecordsInJoinResult);
join.close();
this.memManager.release(join.getFreedMemory());
}
@Test
public void testInMemoryReOpen() throws IOException
{
final int NUM_KEYS = 100000;
final int BUILD_VALS_PER_KEY = 3;
final int PROBE_VALS_PER_KEY = 10;
// create a build input that gives 3 million pairs with 3 values sharing the same key
MutableObjectIterator<IntPair> buildInput = new UniformIntPairGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
// create a probe input that gives 10 million pairs with 10 values sharing a key
MutableObjectIterator<IntPair> probeInput = new UniformIntPairGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
// allocate the memory for the HashTable
List<MemorySegment> memSegments;
try {
memSegments = this.memManager.allocatePages(MEM_OWNER, 896);
}
catch (MemoryAllocationException maex) {
fail("Memory for the Join could not be provided.");
return;
}
// ----------------------------------------------------------------------------------------
final MutableHashTable<IntPair, IntPair> join = new MutableHashTable<IntPair, IntPair>(
this.pairBuildSideAccesssor, this.pairProbeSideAccesssor,
this.pairBuildSideComparator, this.pairProbeSideComparator, this.pairComparator,
memSegments, ioManager);
join.open(buildInput, probeInput);
final IntPair recordReuse = new IntPair();
int numRecordsInJoinResult = 0;
while (join.nextRecord()) {
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", NUM_KEYS * BUILD_VALS_PER_KEY * PROBE_VALS_PER_KEY, numRecordsInJoinResult);
join.close();
// ----------------------------------------------------------------------------------------
// recreate the inputs
// create a build input that gives 3 million pairs with 3 values sharing the same key
buildInput = new UniformIntPairGenerator(NUM_KEYS, BUILD_VALS_PER_KEY, false);
// create a probe input that gives 10 million pairs with 10 values sharing a key
probeInput = new UniformIntPairGenerator(NUM_KEYS, PROBE_VALS_PER_KEY, true);
join.open(buildInput, probeInput);
numRecordsInJoinResult = 0;
while (join.nextRecord()) {
HashBucketIterator<IntPair, IntPair> buildSide = join.getBuildSideIterator();
while (buildSide.next(recordReuse) != null) {
numRecordsInJoinResult++;
}
}
Assert.assertEquals("Wrong number of records in join result.", NUM_KEYS * BUILD_VALS_PER_KEY * PROBE_VALS_PER_KEY, numRecordsInJoinResult);
join.close();
// ----------------------------------------------------------------------------------------
this.memManager.release(join.getFreedMemory());
}
// ============================================================================================
/**
* An iterator that returns the Key/Value pairs with identical value a given number of times.
*/
public static final class ConstantsKeyValuePairsIterator implements MutableObjectIterator<Record>
{
private final IntValue key;
private final IntValue value;
private int numLeft;
public ConstantsKeyValuePairsIterator(int key, int value, int count)
{
this.key = new IntValue(key);
this.value = new IntValue(value);
this.numLeft = count;
}
@Override
public Record next(Record reuse) {
if (this.numLeft > 0) {
this.numLeft--;
reuse.clear();
reuse.setField(0, this.key);
reuse.setField(1, this.value);
return reuse;
}
else {
return null;
}
}
}
// ============================================================================================
/**
* An iterator that returns the Key/Value pairs with identical value a given number of times.
*/
private static final class ConstantsIntPairsIterator implements MutableObjectIterator<IntPair>
{
private final int key;
private final int value;
private int numLeft;
public ConstantsIntPairsIterator(int key, int value, int count)
{
this.key = key;
this.value = value;
this.numLeft = count;
}
@Override
public IntPair next(IntPair reuse) {
if (this.numLeft > 0) {
this.numLeft--;
reuse.setKey(this.key);
reuse.setValue(this.value);
return reuse;
}
else {
return null;
}
}
}
// ============================================================================================
public static final class RecordPairComparatorFirstInt extends TypePairComparator<Record, Record> {
private int key;
@Override
public void setReference(Record reference) {
try {
this.key = reference.getField(0, IntValue.class).getValue();
} catch (NullPointerException npex) {
throw new NullKeyFieldException();
}
}
@Override
public boolean equalToReference(Record candidate) {
try {
return this.key == candidate.getField(0, IntValue.class).getValue();
} catch (NullPointerException npex) {
throw new NullKeyFieldException();
}
}
@Override
public int compareToReference(Record candidate) {
try {
final int i = candidate.getField(0, IntValue.class).getValue();
return i - this.key;
} catch (NullPointerException npex) {
throw new NullKeyFieldException();
}
}
}
}