/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cassandra.db.compaction;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import org.apache.cassandra.io.sstable.format.SSTableReader;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.apache.cassandra.OrderedJUnit4ClassRunner;
import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.Util;
import org.apache.cassandra.config.KSMetaData;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.DecoratedKey;
import org.apache.cassandra.db.Keyspace;
import org.apache.cassandra.db.Mutation;
import org.apache.cassandra.dht.Range;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.locator.SimpleStrategy;
import org.apache.cassandra.notifications.SSTableAddedNotification;
import org.apache.cassandra.notifications.SSTableRepairStatusChanged;
import org.apache.cassandra.repair.RepairJobDesc;
import org.apache.cassandra.repair.Validator;
import org.apache.cassandra.service.ActiveRepairService;
import org.apache.cassandra.utils.FBUtilities;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
@RunWith(OrderedJUnit4ClassRunner.class)
public class LeveledCompactionStrategyTest
{
private static final String KEYSPACE1 = "LeveledCompactionStrategyTest";
private static final String CF_STANDARDDLEVELED = "StandardLeveled";
private Keyspace keyspace;
private ColumnFamilyStore cfs;
@BeforeClass
public static void defineSchema() throws ConfigurationException
{
Map<String, String> leveledOptions = new HashMap<>();
leveledOptions.put("sstable_size_in_mb", "1");
SchemaLoader.prepareServer();
SchemaLoader.createKeyspace(KEYSPACE1,
SimpleStrategy.class,
KSMetaData.optsWithRF(1),
SchemaLoader.standardCFMD(KEYSPACE1, CF_STANDARDDLEVELED)
.compactionStrategyClass(LeveledCompactionStrategy.class)
.compactionStrategyOptions(leveledOptions));
}
@Before
public void enableCompaction()
{
keyspace = Keyspace.open(KEYSPACE1);
cfs = keyspace.getColumnFamilyStore(CF_STANDARDDLEVELED);
cfs.enableAutoCompaction();
}
/**
* Since we use StandardLeveled CF for every test, we want to clean up after the test.
*/
@After
public void truncateSTandardLeveled()
{
cfs.truncateBlocking();
}
/**
* Ensure that the grouping operation preserves the levels of grouped tables
*/
@Test
public void testGrouperLevels() throws Exception{
ByteBuffer value = ByteBuffer.wrap(new byte[100 * 1024]); // 100 KB value, make it easy to have multiple files
// Enough data to have a level 1 and 2
int rows = 20;
int columns = 10;
// Adds enough data to trigger multiple sstable per level
for (int r = 0; r < rows; r++)
{
DecoratedKey key = Util.dk(String.valueOf(r));
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
for (int c = 0; c < columns; c++)
{
rm.add(CF_STANDARDDLEVELED, Util.cellname("column" + c), value, 0);
}
rm.apply();
cfs.forceBlockingFlush();
}
waitForLeveling(cfs);
LeveledCompactionStrategy strategy = (LeveledCompactionStrategy) cfs.getCompactionStrategy();
// Checking we're not completely bad at math
assert strategy.getLevelSize(1) > 0;
assert strategy.getLevelSize(2) > 0;
Collection<Collection<SSTableReader>> groupedSSTables = cfs.getCompactionStrategy().groupSSTablesForAntiCompaction(cfs.getSSTables());
for (Collection<SSTableReader> sstableGroup : groupedSSTables)
{
int groupLevel = -1;
Iterator<SSTableReader> it = sstableGroup.iterator();
while (it.hasNext())
{
SSTableReader sstable = it.next();
int tableLevel = sstable.getSSTableLevel();
if (groupLevel == -1)
groupLevel = tableLevel;
assert groupLevel == tableLevel;
}
}
}
/*
* This exercises in particular the code of #4142
*/
@Test
public void testValidationMultipleSSTablePerLevel() throws Exception
{
ByteBuffer value = ByteBuffer.wrap(new byte[100 * 1024]); // 100 KB value, make it easy to have multiple files
// Enough data to have a level 1 and 2
int rows = 20;
int columns = 10;
// Adds enough data to trigger multiple sstable per level
for (int r = 0; r < rows; r++)
{
DecoratedKey key = Util.dk(String.valueOf(r));
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
for (int c = 0; c < columns; c++)
{
rm.add(CF_STANDARDDLEVELED, Util.cellname("column" + c), value, 0);
}
rm.applyUnsafe();
cfs.forceBlockingFlush();
}
waitForLeveling(cfs);
WrappingCompactionStrategy strategy = (WrappingCompactionStrategy) cfs.getCompactionStrategy();
// Checking we're not completely bad at math
assert strategy.getSSTableCountPerLevel()[1] > 0;
assert strategy.getSSTableCountPerLevel()[2] > 0;
Range<Token> range = new Range<>(Util.token(""), Util.token(""));
int gcBefore = keyspace.getColumnFamilyStore(CF_STANDARDDLEVELED).gcBefore(System.currentTimeMillis());
UUID parentRepSession = UUID.randomUUID();
ActiveRepairService.instance.registerParentRepairSession(parentRepSession, Arrays.asList(cfs), Arrays.asList(range), false);
RepairJobDesc desc = new RepairJobDesc(parentRepSession, UUID.randomUUID(), KEYSPACE1, CF_STANDARDDLEVELED, range);
Validator validator = new Validator(desc, FBUtilities.getBroadcastAddress(), gcBefore);
CompactionManager.instance.submitValidation(cfs, validator).get();
}
/**
* wait for leveled compaction to quiesce on the given columnfamily
*/
private void waitForLeveling(ColumnFamilyStore cfs) throws InterruptedException
{
WrappingCompactionStrategy strategy = (WrappingCompactionStrategy) cfs.getCompactionStrategy();
// L0 is the lowest priority, so when that's done, we know everything is done
while (strategy.getSSTableCountPerLevel()[0] > 1)
Thread.sleep(100);
}
@Test
public void testCompactionProgress() throws Exception
{
// make sure we have SSTables in L1
ByteBuffer value = ByteBuffer.wrap(new byte[100 * 1024]);
int rows = 2;
int columns = 10;
for (int r = 0; r < rows; r++)
{
DecoratedKey key = Util.dk(String.valueOf(r));
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
for (int c = 0; c < columns; c++)
{
rm.add(CF_STANDARDDLEVELED, Util.cellname("column" + c), value, 0);
}
rm.applyUnsafe();
cfs.forceBlockingFlush();
}
waitForLeveling(cfs);
LeveledCompactionStrategy strategy = (LeveledCompactionStrategy) ((WrappingCompactionStrategy) cfs.getCompactionStrategy()).getWrappedStrategies().get(1);
assert strategy.getLevelSize(1) > 0;
// get LeveledScanner for level 1 sstables
Collection<SSTableReader> sstables = strategy.manifest.getLevel(1);
List<ICompactionScanner> scanners = strategy.getScanners(sstables).scanners;
assertEquals(1, scanners.size()); // should be one per level
ICompactionScanner scanner = scanners.get(0);
// scan through to the end
while (scanner.hasNext())
scanner.next();
// scanner.getCurrentPosition should be equal to total bytes of L1 sstables
assert scanner.getCurrentPosition() == SSTableReader.getTotalBytes(sstables);
}
@Test
public void testMutateLevel() throws Exception
{
ByteBuffer value = ByteBuffer.wrap(new byte[100 * 1024]); // 100 KB value, make it easy to have multiple files
// Enough data to have a level 1 and 2
int rows = 20;
int columns = 10;
// Adds enough data to trigger multiple sstable per level
for (int r = 0; r < rows; r++)
{
DecoratedKey key = Util.dk(String.valueOf(r));
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
for (int c = 0; c < columns; c++)
{
rm.add(CF_STANDARDDLEVELED, Util.cellname("column" + c), value, 0);
}
rm.applyUnsafe();
cfs.forceBlockingFlush();
}
waitForLeveling(cfs);
cfs.forceBlockingFlush();
LeveledCompactionStrategy strategy = (LeveledCompactionStrategy) ((WrappingCompactionStrategy) cfs.getCompactionStrategy()).getWrappedStrategies().get(1);
cfs.disableAutoCompaction();
while(CompactionManager.instance.isCompacting(Arrays.asList(cfs)))
Thread.sleep(100);
for (SSTableReader s : cfs.getSSTables())
{
assertTrue(s.getSSTableLevel() != 6);
strategy.manifest.remove(s);
s.descriptor.getMetadataSerializer().mutateLevel(s.descriptor, 6);
s.reloadSSTableMetadata();
strategy.manifest.add(s);
}
// verify that all sstables in the changed set is level 6
for (SSTableReader s : cfs.getSSTables())
assertEquals(6, s.getSSTableLevel());
int[] levels = strategy.manifest.getAllLevelSize();
// verify that the manifest has correct amount of sstables
assertEquals(cfs.getSSTables().size(), levels[6]);
}
@Test
public void testNewRepairedSSTable() throws Exception
{
ByteBuffer value = ByteBuffer.wrap(new byte[100 * 1024]); // 100 KB value, make it easy to have multiple files
// Enough data to have a level 1 and 2
int rows = 20;
int columns = 10;
// Adds enough data to trigger multiple sstable per level
for (int r = 0; r < rows; r++)
{
DecoratedKey key = Util.dk(String.valueOf(r));
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
for (int c = 0; c < columns; c++)
{
rm.add(CF_STANDARDDLEVELED, Util.cellname("column" + c), value, 0);
}
rm.applyUnsafe();
cfs.forceBlockingFlush();
}
waitForLeveling(cfs);
cfs.disableAutoCompaction();
while(CompactionManager.instance.isCompacting(Arrays.asList(cfs)))
Thread.sleep(100);
WrappingCompactionStrategy strategy = (WrappingCompactionStrategy) cfs.getCompactionStrategy();
List<AbstractCompactionStrategy> strategies = strategy.getWrappedStrategies();
LeveledCompactionStrategy repaired = (LeveledCompactionStrategy) strategies.get(0);
LeveledCompactionStrategy unrepaired = (LeveledCompactionStrategy) strategies.get(1);
assertEquals(0, repaired.manifest.getLevelCount() );
assertEquals(2, unrepaired.manifest.getLevelCount());
assertTrue(strategy.getSSTableCountPerLevel()[1] > 0);
assertTrue(strategy.getSSTableCountPerLevel()[2] > 0);
for (SSTableReader sstable : cfs.getSSTables())
assertFalse(sstable.isRepaired());
int sstableCount = 0;
for (List<SSTableReader> level : unrepaired.manifest.generations)
sstableCount += level.size();
// we only have unrepaired sstables:
assertEquals(sstableCount, cfs.getSSTables().size());
SSTableReader sstable1 = unrepaired.manifest.generations[2].get(0);
SSTableReader sstable2 = unrepaired.manifest.generations[1].get(0);
sstable1.descriptor.getMetadataSerializer().mutateRepairedAt(sstable1.descriptor, System.currentTimeMillis());
sstable1.reloadSSTableMetadata();
assertTrue(sstable1.isRepaired());
strategy.handleNotification(new SSTableRepairStatusChanged(Arrays.asList(sstable1)), this);
int repairedSSTableCount = 0;
for (List<SSTableReader> level : repaired.manifest.generations)
repairedSSTableCount += level.size();
assertEquals(1, repairedSSTableCount);
// make sure the repaired sstable ends up in the same level in the repaired manifest:
assertTrue(repaired.manifest.generations[2].contains(sstable1));
// and that it is gone from unrepaired
assertFalse(unrepaired.manifest.generations[2].contains(sstable1));
unrepaired.removeSSTable(sstable2);
strategy.handleNotification(new SSTableAddedNotification(sstable2), this);
assertTrue(unrepaired.manifest.getLevel(1).contains(sstable2));
assertFalse(repaired.manifest.getLevel(1).contains(sstable2));
}
}