package org.apache.cassandra.io.sstable;
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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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* Unless required by applicable law or agreed to in writing,
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import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.ExecutionException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.junit.Test;
import org.apache.cassandra.CleanupHelper;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.db.*;
import org.apache.cassandra.db.compaction.CompactionManager;
import org.apache.cassandra.db.filter.QueryPath;
import org.apache.cassandra.dht.Range;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.io.util.FileDataInput;
import org.apache.cassandra.io.util.MmappedSegmentedFile;
import org.apache.cassandra.service.StorageService;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.Pair;
import org.apache.cassandra.Util;
import static org.junit.Assert.assertEquals;
public class SSTableReaderTest extends CleanupHelper
{
static Token t(int i)
{
return StorageService.getPartitioner().getToken(ByteBufferUtil.bytes(String.valueOf(i)));
}
@Test
public void testGetPositionsForRanges() throws IOException, ExecutionException, InterruptedException
{
Table table = Table.open("Keyspace1");
ColumnFamilyStore store = table.getColumnFamilyStore("Standard2");
// insert data and compact to a single sstable
CompactionManager.instance.disableAutoCompaction();
for (int j = 0; j < 10; j++)
{
ByteBuffer key = ByteBufferUtil.bytes(String.valueOf(j));
RowMutation rm = new RowMutation("Keyspace1", key);
rm.add(new QueryPath("Standard2", null, ByteBufferUtil.bytes("0")), ByteBufferUtil.EMPTY_BYTE_BUFFER, j);
rm.apply();
}
store.forceBlockingFlush();
CompactionManager.instance.performMajor(store);
List<Range> ranges = new ArrayList<Range>();
// 1 key
ranges.add(new Range(t(0), t(1)));
// 2 keys
ranges.add(new Range(t(2), t(4)));
// wrapping range from key to end
ranges.add(new Range(t(6), StorageService.getPartitioner().getMinimumToken()));
// empty range (should be ignored)
ranges.add(new Range(t(9), t(91)));
// confirm that positions increase continuously
SSTableReader sstable = store.getSSTables().iterator().next();
long previous = -1;
for (Pair<Long,Long> section : sstable.getPositionsForRanges(ranges))
{
assert previous <= section.left : previous + " ! < " + section.left;
assert section.left < section.right : section.left + " ! < " + section.right;
previous = section.right;
}
}
@Test
public void testSpannedIndexPositions() throws IOException, ExecutionException, InterruptedException
{
MmappedSegmentedFile.MAX_SEGMENT_SIZE = 40; // each index entry is ~11 bytes, so this will generate lots of segments
Table table = Table.open("Keyspace1");
ColumnFamilyStore store = table.getColumnFamilyStore("Standard1");
// insert a bunch of data and compact to a single sstable
CompactionManager.instance.disableAutoCompaction();
for (int j = 0; j < 100; j += 2)
{
ByteBuffer key = ByteBufferUtil.bytes(String.valueOf(j));
RowMutation rm = new RowMutation("Keyspace1", key);
rm.add(new QueryPath("Standard1", null, ByteBufferUtil.bytes("0")), ByteBufferUtil.EMPTY_BYTE_BUFFER, j);
rm.apply();
}
store.forceBlockingFlush();
CompactionManager.instance.performMajor(store);
// check that all our keys are found correctly
SSTableReader sstable = store.getSSTables().iterator().next();
for (int j = 0; j < 100; j += 2)
{
DecoratedKey dk = Util.dk(String.valueOf(j));
FileDataInput file = sstable.getFileDataInput(dk, DatabaseDescriptor.getIndexedReadBufferSizeInKB() * 1024);
DecoratedKey keyInDisk = SSTableReader.decodeKey(sstable.partitioner,
sstable.descriptor,
ByteBufferUtil.readWithShortLength(file));
assert keyInDisk.equals(dk) : String.format("%s != %s in %s", keyInDisk, dk, file.getPath());
}
// check no false positives
for (int j = 1; j < 110; j += 2)
{
DecoratedKey dk = Util.dk(String.valueOf(j));
assert sstable.getPosition(dk, SSTableReader.Operator.EQ) == -1;
}
}
@Test
public void testPersistentStatistics() throws IOException, ExecutionException, InterruptedException
{
Table table = Table.open("Keyspace1");
ColumnFamilyStore store = table.getColumnFamilyStore("Standard1");
for (int j = 0; j < 100; j += 2)
{
ByteBuffer key = ByteBufferUtil.bytes(String.valueOf(j));
RowMutation rm = new RowMutation("Keyspace1", key);
rm.add(new QueryPath("Standard1", null, ByteBufferUtil.bytes("0")), ByteBufferUtil.EMPTY_BYTE_BUFFER, j);
rm.apply();
}
store.forceBlockingFlush();
assert store.getMaxRowSize() != 0;
}
@Test
public void testGetPositionsForRangesWithKeyCache() throws IOException, ExecutionException, InterruptedException
{
Table table = Table.open("Keyspace1");
ColumnFamilyStore store = table.getColumnFamilyStore("Standard2");
store.getKeyCache().setCapacity(100);
// insert data and compact to a single sstable
CompactionManager.instance.disableAutoCompaction();
for (int j = 0; j < 10; j++)
{
ByteBuffer key = ByteBufferUtil.bytes(String.valueOf(j));
RowMutation rm = new RowMutation("Keyspace1", key);
rm.add(new QueryPath("Standard2", null, ByteBufferUtil.bytes("0")), ByteBufferUtil.EMPTY_BYTE_BUFFER, j);
rm.apply();
}
store.forceBlockingFlush();
CompactionManager.instance.performMajor(store);
SSTableReader sstable = store.getSSTables().iterator().next();
long p2 = sstable.getPosition(k(2), SSTableReader.Operator.EQ);
long p3 = sstable.getPosition(k(3), SSTableReader.Operator.EQ);
long p6 = sstable.getPosition(k(6), SSTableReader.Operator.EQ);
long p7 = sstable.getPosition(k(7), SSTableReader.Operator.EQ);
Pair<Long, Long> p = sstable.getPositionsForRanges(makeRanges(t(2), t(6))).iterator().next();
// range are start exclusive so we should start at 3
assert p.left == p3;
// to capture 6 we have to stop at the start of 7
assert p.right == p7;
}
private List<Range> makeRanges(Token left, Token right)
{
return Arrays.asList(new Range[]{ new Range(left, right) });
}
private DecoratedKey k(int i)
{
return new DecoratedKey(t(i), ByteBufferUtil.bytes(String.valueOf(i)));
}
}