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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
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* KIND, either express or implied. See the License for the
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package org.apache.cassandra.db.compaction;
import java.io.*;
import java.nio.ByteBuffer;
import java.util.*;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;
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.db.*;
import org.apache.cassandra.db.columniterator.OnDiskAtomIterator;
import org.apache.cassandra.db.filter.QueryFilter;
import org.apache.cassandra.dht.BytesToken;
import org.apache.cassandra.dht.Range;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.io.sstable.Component;
import org.apache.cassandra.io.sstable.SSTableReader;
import org.apache.cassandra.io.sstable.SSTableScanner;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.FBUtilities;
import org.apache.cassandra.utils.Pair;
import static org.junit.Assert.*;
@RunWith(OrderedJUnit4ClassRunner.class)
public class CompactionsTest extends SchemaLoader
{
private static final String STANDARD1 = "Standard1";
public static final String KEYSPACE1 = "Keyspace1";
public ColumnFamilyStore testSingleSSTableCompaction(String strategyClassName) throws Exception
{
Keyspace keyspace = Keyspace.open(KEYSPACE1);
ColumnFamilyStore store = keyspace.getColumnFamilyStore(STANDARD1);
store.clearUnsafe();
store.metadata.gcGraceSeconds(1);
store.setCompactionStrategyClass(strategyClassName);
// disable compaction while flushing
store.disableAutoCompaction();
long timestamp = populate(KEYSPACE1, STANDARD1, 0, 9, 3); //ttl=3s
store.forceBlockingFlush();
assertEquals(1, store.getSSTables().size());
long originalSize = store.getSSTables().iterator().next().uncompressedLength();
// wait enough to force single compaction
TimeUnit.SECONDS.sleep(5);
// enable compaction, submit background and wait for it to complete
store.enableAutoCompaction();
FBUtilities.waitOnFutures(CompactionManager.instance.submitBackground(store));
while (CompactionManager.instance.getPendingTasks() > 0 || CompactionManager.instance.getActiveCompactions() > 0)
TimeUnit.SECONDS.sleep(1);
// and sstable with ttl should be compacted
assertEquals(1, store.getSSTables().size());
long size = store.getSSTables().iterator().next().uncompressedLength();
assertTrue("should be less than " + originalSize + ", but was " + size, size < originalSize);
// make sure max timestamp of compacted sstables is recorded properly after compaction.
assertMaxTimestamp(store, timestamp);
return store;
}
private long populate(String ks, String cf, int startRowKey, int endRowKey, int ttl) {
long timestamp = System.currentTimeMillis();
for (int i = startRowKey; i <= endRowKey; i++)
{
DecoratedKey key = Util.dk(Integer.toString(i));
Mutation rm = new Mutation(ks, key.getKey());
for (int j = 0; j < 10; j++)
rm.add(cf, Util.cellname(Integer.toString(j)),
ByteBufferUtil.EMPTY_BYTE_BUFFER,
timestamp,
j > 0 ? ttl : 0); // let first column never expire, since deleting all columns does not produce sstable
rm.apply();
}
return timestamp;
}
/**
* Test to see if sstable has enough expired columns, it is compacted itself.
*/
@Test
public void testSingleSSTableCompactionWithSizeTieredCompaction() throws Exception
{
testSingleSSTableCompaction(SizeTieredCompactionStrategy.class.getCanonicalName());
}
@Test
public void testSingleSSTableCompactionWithLeveledCompaction() throws Exception
{
ColumnFamilyStore store = testSingleSSTableCompaction(LeveledCompactionStrategy.class.getCanonicalName());
LeveledCompactionStrategy strategy = (LeveledCompactionStrategy) store.getCompactionStrategy();
// tombstone removal compaction should not promote level
assert strategy.getLevelSize(0) == 1;
}
@Test
public void testSuperColumnTombstones() throws ExecutionException, InterruptedException
{
Keyspace keyspace = Keyspace.open(KEYSPACE1);
ColumnFamilyStore cfs = keyspace.getColumnFamilyStore("Super1");
cfs.disableAutoCompaction();
DecoratedKey key = Util.dk("tskey");
ByteBuffer scName = ByteBufferUtil.bytes("TestSuperColumn");
// a subcolumn
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
rm.add("Super1", Util.cellname(scName, ByteBufferUtil.bytes(0)),
ByteBufferUtil.EMPTY_BYTE_BUFFER,
FBUtilities.timestampMicros());
rm.apply();
cfs.forceBlockingFlush();
// shadow the subcolumn with a supercolumn tombstone
rm = new Mutation(KEYSPACE1, key.getKey());
rm.deleteRange("Super1", SuperColumns.startOf(scName), SuperColumns.endOf(scName), FBUtilities.timestampMicros());
rm.apply();
cfs.forceBlockingFlush();
CompactionManager.instance.performMaximal(cfs);
assertEquals(1, cfs.getSSTables().size());
// check that the shadowed column is gone
SSTableReader sstable = cfs.getSSTables().iterator().next();
Range keyRange = new Range<RowPosition>(key, sstable.partitioner.getMinimumToken().maxKeyBound());
SSTableScanner scanner = sstable.getScanner(DataRange.forKeyRange(keyRange));
OnDiskAtomIterator iter = scanner.next();
assertEquals(key, iter.getKey());
assert iter.next() instanceof RangeTombstone;
assert !iter.hasNext();
}
@Test
public void testUncheckedTombstoneSizeTieredCompaction() throws Exception
{
Keyspace keyspace = Keyspace.open(KEYSPACE1);
ColumnFamilyStore store = keyspace.getColumnFamilyStore(STANDARD1);
store.clearUnsafe();
store.metadata.gcGraceSeconds(1);
store.metadata.compactionStrategyOptions.put("tombstone_compaction_interval", "1");
store.metadata.compactionStrategyOptions.put("unchecked_tombstone_compaction", "false");
store.reload();
store.setCompactionStrategyClass(SizeTieredCompactionStrategy.class.getName());
// disable compaction while flushing
store.disableAutoCompaction();
//Populate sstable1 with with keys [0..9]
populate(KEYSPACE1, STANDARD1, 0, 9, 3); //ttl=3s
store.forceBlockingFlush();
//Populate sstable2 with with keys [10..19] (keys do not overlap with SSTable1)
long timestamp2 = populate(KEYSPACE1, STANDARD1, 10, 19, 3); //ttl=3s
store.forceBlockingFlush();
assertEquals(2, store.getSSTables().size());
Iterator<SSTableReader> it = store.getSSTables().iterator();
long originalSize1 = it.next().uncompressedLength();
long originalSize2 = it.next().uncompressedLength();
// wait enough to force single compaction
TimeUnit.SECONDS.sleep(5);
// enable compaction, submit background and wait for it to complete
store.enableAutoCompaction();
FBUtilities.waitOnFutures(CompactionManager.instance.submitBackground(store));
while (CompactionManager.instance.getPendingTasks() > 0 || CompactionManager.instance.getActiveCompactions() > 0)
TimeUnit.SECONDS.sleep(1);
// even though both sstables were candidate for tombstone compaction
// it was not executed because they have an overlapping token range
assertEquals(2, store.getSSTables().size());
it = store.getSSTables().iterator();
long newSize1 = it.next().uncompressedLength();
long newSize2 = it.next().uncompressedLength();
assertEquals("candidate sstable should not be tombstone-compacted because its key range overlap with other sstable",
originalSize1, newSize1);
assertEquals("candidate sstable should not be tombstone-compacted because its key range overlap with other sstable",
originalSize2, newSize2);
// now let's enable the magic property
store.metadata.compactionStrategyOptions.put("unchecked_tombstone_compaction", "true");
store.reload();
//submit background task again and wait for it to complete
FBUtilities.waitOnFutures(CompactionManager.instance.submitBackground(store));
while (CompactionManager.instance.getPendingTasks() > 0 || CompactionManager.instance.getActiveCompactions() > 0)
TimeUnit.SECONDS.sleep(1);
//we still have 2 sstables, since they were not compacted against each other
assertEquals(2, store.getSSTables().size());
it = store.getSSTables().iterator();
newSize1 = it.next().uncompressedLength();
newSize2 = it.next().uncompressedLength();
assertTrue("should be less than " + originalSize1 + ", but was " + newSize1, newSize1 < originalSize1);
assertTrue("should be less than " + originalSize2 + ", but was " + newSize2, newSize2 < originalSize2);
// make sure max timestamp of compacted sstables is recorded properly after compaction.
assertMaxTimestamp(store, timestamp2);
}
public static void assertMaxTimestamp(ColumnFamilyStore cfs, long maxTimestampExpected)
{
long maxTimestampObserved = Long.MIN_VALUE;
for (SSTableReader sstable : cfs.getSSTables())
maxTimestampObserved = Math.max(sstable.getMaxTimestamp(), maxTimestampObserved);
assertEquals(maxTimestampExpected, maxTimestampObserved);
}
@Test
public void testEchoedRow()
{
// This test check that EchoedRow doesn't skipp rows: see CASSANDRA-2653
Keyspace keyspace = Keyspace.open(KEYSPACE1);
ColumnFamilyStore cfs = keyspace.getColumnFamilyStore("Standard2");
// disable compaction while flushing
cfs.disableAutoCompaction();
// Insert 4 keys in two sstables. We need the sstables to have 2 rows
// at least to trigger what was causing CASSANDRA-2653
for (int i=1; i < 5; i++)
{
DecoratedKey key = Util.dk(String.valueOf(i));
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
rm.add("Standard2", Util.cellname(String.valueOf(i)), ByteBufferUtil.EMPTY_BYTE_BUFFER, i);
rm.apply();
if (i % 2 == 0)
cfs.forceBlockingFlush();
}
Collection<SSTableReader> toCompact = cfs.getSSTables();
assert toCompact.size() == 2;
// Reinserting the same keys. We will compact only the previous sstable, but we need those new ones
// to make sure we use EchoedRow, otherwise it won't be used because purge can be done.
for (int i=1; i < 5; i++)
{
DecoratedKey key = Util.dk(String.valueOf(i));
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
rm.add("Standard2", Util.cellname(String.valueOf(i)), ByteBufferUtil.EMPTY_BYTE_BUFFER, i);
rm.apply();
}
cfs.forceBlockingFlush();
SSTableReader tmpSSTable = null;
for (SSTableReader sstable : cfs.getSSTables())
if (!toCompact.contains(sstable))
tmpSSTable = sstable;
assert tmpSSTable != null;
// Force compaction on first sstables. Since each row is in only one sstable, we will be using EchoedRow.
Util.compact(cfs, toCompact);
assertEquals(2, cfs.getSSTables().size());
// Now, we remove the sstable that was just created to force the use of EchoedRow (so that it doesn't hide the problem)
cfs.markObsolete(Collections.singleton(tmpSSTable), OperationType.UNKNOWN);
assertEquals(1, cfs.getSSTables().size());
// Now assert we do have the 4 keys
assertEquals(4, Util.getRangeSlice(cfs).size());
}
@Test
public void testDontPurgeAccidentaly() throws InterruptedException
{
testDontPurgeAccidentaly("test1", "Super5");
// Use CF with gc_grace=0, see last bug of CASSANDRA-2786
testDontPurgeAccidentaly("test1", "SuperDirectGC");
}
@Test
public void testUserDefinedCompaction() throws Exception
{
Keyspace keyspace = Keyspace.open(KEYSPACE1);
final String cfname = "Standard3"; // use clean(no sstable) CF
ColumnFamilyStore cfs = keyspace.getColumnFamilyStore(cfname);
// disable compaction while flushing
cfs.disableAutoCompaction();
final int ROWS_PER_SSTABLE = 10;
for (int i = 0; i < ROWS_PER_SSTABLE; i++) {
DecoratedKey key = Util.dk(String.valueOf(i));
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
rm.add(cfname, Util.cellname("col"),
ByteBufferUtil.EMPTY_BYTE_BUFFER,
System.currentTimeMillis());
rm.apply();
}
cfs.forceBlockingFlush();
Collection<SSTableReader> sstables = cfs.getSSTables();
assert sstables.size() == 1;
SSTableReader sstable = sstables.iterator().next();
int prevGeneration = sstable.descriptor.generation;
String file = new File(sstable.descriptor.filenameFor(Component.DATA)).getName();
// submit user defined compaction on flushed sstable
CompactionManager.instance.forceUserDefinedCompaction(file);
// wait until user defined compaction finishes
do
{
Thread.sleep(100);
} while (CompactionManager.instance.getPendingTasks() > 0 || CompactionManager.instance.getActiveCompactions() > 0);
// CF should have only one sstable with generation number advanced
sstables = cfs.getSSTables();
assert sstables.size() == 1;
assert sstables.iterator().next().descriptor.generation == prevGeneration + 1;
}
@Test
public void testCompactionLog() throws Exception
{
SystemKeyspace.discardCompactionsInProgress();
String cf = "Standard4";
ColumnFamilyStore cfs = Keyspace.open(KEYSPACE1).getColumnFamilyStore(cf);
insertData(KEYSPACE1, cf, 0, 1);
cfs.forceBlockingFlush();
Collection<SSTableReader> sstables = cfs.getSSTables();
assert !sstables.isEmpty();
Set<Integer> generations = Sets.newHashSet(Iterables.transform(sstables, new Function<SSTableReader, Integer>()
{
public Integer apply(SSTableReader sstable)
{
return sstable.descriptor.generation;
}
}));
UUID taskId = SystemKeyspace.startCompaction(cfs, sstables);
Map<Pair<String, String>, Map<Integer, UUID>> compactionLogs = SystemKeyspace.getUnfinishedCompactions();
Set<Integer> unfinishedCompactions = compactionLogs.get(Pair.create(KEYSPACE1, cf)).keySet();
assert unfinishedCompactions.containsAll(generations);
SystemKeyspace.finishCompaction(taskId);
compactionLogs = SystemKeyspace.getUnfinishedCompactions();
assert !compactionLogs.containsKey(Pair.create(KEYSPACE1, cf));
}
private void testDontPurgeAccidentaly(String k, String cfname) throws InterruptedException
{
// This test catches the regression of CASSANDRA-2786
Keyspace keyspace = Keyspace.open(KEYSPACE1);
ColumnFamilyStore cfs = keyspace.getColumnFamilyStore(cfname);
// disable compaction while flushing
cfs.clearUnsafe();
cfs.disableAutoCompaction();
// Add test row
DecoratedKey key = Util.dk(k);
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
rm.add(cfname, Util.cellname(ByteBufferUtil.bytes("sc"), ByteBufferUtil.bytes("c")), ByteBufferUtil.EMPTY_BYTE_BUFFER, 0);
rm.apply();
cfs.forceBlockingFlush();
Collection<SSTableReader> sstablesBefore = cfs.getSSTables();
QueryFilter filter = QueryFilter.getIdentityFilter(key, cfname, System.currentTimeMillis());
assertTrue(cfs.getColumnFamily(filter).hasColumns());
// Remove key
rm = new Mutation(KEYSPACE1, key.getKey());
rm.delete(cfname, 2);
rm.apply();
ColumnFamily cf = cfs.getColumnFamily(filter);
assertTrue("should be empty: " + cf, cf == null || !cf.hasColumns());
// Sleep one second so that the removal is indeed purgeable even with gcgrace == 0
Thread.sleep(1000);
cfs.forceBlockingFlush();
Collection<SSTableReader> sstablesAfter = cfs.getSSTables();
Collection<SSTableReader> toCompact = new ArrayList<SSTableReader>();
for (SSTableReader sstable : sstablesAfter)
if (!sstablesBefore.contains(sstable))
toCompact.add(sstable);
Util.compact(cfs, toCompact);
cf = cfs.getColumnFamily(filter);
assertTrue("should be empty: " + cf, cf == null || !cf.hasColumns());
}
private static Range<Token> rangeFor(int start, int end)
{
return new Range<Token>(new BytesToken(String.format("%03d", start).getBytes()),
new BytesToken(String.format("%03d", end).getBytes()));
}
private static Collection<Range<Token>> makeRanges(int ... keys)
{
Collection<Range<Token>> ranges = new ArrayList<Range<Token>>(keys.length / 2);
for (int i = 0; i < keys.length; i += 2)
ranges.add(rangeFor(keys[i], keys[i + 1]));
return ranges;
}
private static void insertRowWithKey(int key)
{
long timestamp = System.currentTimeMillis();
DecoratedKey decoratedKey = Util.dk(String.format("%03d", key));
Mutation rm = new Mutation(KEYSPACE1, decoratedKey.getKey());
rm.add("Standard1", Util.cellname("col"), ByteBufferUtil.EMPTY_BYTE_BUFFER, timestamp, 1000);
rm.apply();
}
@Test
public void testNeedsCleanup()
{
Keyspace keyspace = Keyspace.open(KEYSPACE1);
ColumnFamilyStore store = keyspace.getColumnFamilyStore("Standard1");
store.clearUnsafe();
// disable compaction while flushing
store.disableAutoCompaction();
// write three groups of 9 keys: 001, 002, ... 008, 009
// 101, 102, ... 108, 109
// 201, 202, ... 208, 209
for (int i = 1; i < 10; i++)
{
insertRowWithKey(i);
insertRowWithKey(i + 100);
insertRowWithKey(i + 200);
}
store.forceBlockingFlush();
assertEquals(1, store.getSSTables().size());
SSTableReader sstable = store.getSSTables().iterator().next();
// contiguous range spans all data
assertFalse(CompactionManager.needsCleanup(sstable, makeRanges(0, 209)));
assertFalse(CompactionManager.needsCleanup(sstable, makeRanges(0, 210)));
// separate ranges span all data
assertFalse(CompactionManager.needsCleanup(sstable, makeRanges(0, 9,
100, 109,
200, 209)));
assertFalse(CompactionManager.needsCleanup(sstable, makeRanges(0, 109,
200, 210)));
assertFalse(CompactionManager.needsCleanup(sstable, makeRanges(0, 9,
100, 210)));
// one range is missing completely
assertTrue(CompactionManager.needsCleanup(sstable, makeRanges(100, 109,
200, 209)));
assertTrue(CompactionManager.needsCleanup(sstable, makeRanges(0, 9,
200, 209)));
assertTrue(CompactionManager.needsCleanup(sstable, makeRanges(0, 9,
100, 109)));
// the beginning of one range is missing
assertTrue(CompactionManager.needsCleanup(sstable, makeRanges(1, 9,
100, 109,
200, 209)));
assertTrue(CompactionManager.needsCleanup(sstable, makeRanges(0, 9,
101, 109,
200, 209)));
assertTrue(CompactionManager.needsCleanup(sstable, makeRanges(0, 9,
100, 109,
201, 209)));
// the end of one range is missing
assertTrue(CompactionManager.needsCleanup(sstable, makeRanges(0, 8,
100, 109,
200, 209)));
assertTrue(CompactionManager.needsCleanup(sstable, makeRanges(0, 9,
100, 108,
200, 209)));
assertTrue(CompactionManager.needsCleanup(sstable, makeRanges(0, 9,
100, 109,
200, 208)));
// some ranges don't contain any data
assertFalse(CompactionManager.needsCleanup(sstable, makeRanges(0, 0,
0, 9,
50, 51,
100, 109,
150, 199,
200, 209,
300, 301)));
// same case, but with a middle range not covering some of the existing data
assertFalse(CompactionManager.needsCleanup(sstable, makeRanges(0, 0,
0, 9,
50, 51,
100, 103,
150, 199,
200, 209,
300, 301)));
}
}