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* Licensed to the Apache Software Foundation (ASF) under one
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* 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.
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package org.apache.cassandra.db;
import java.net.InetAddress;
import java.nio.ByteBuffer;
import java.util.Collection;
import org.junit.AfterClass;
import org.junit.Test;
import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.Util;
import org.apache.cassandra.cache.RowCacheKey;
import org.apache.cassandra.db.composites.*;
import org.apache.cassandra.db.compaction.CompactionManager;
import org.apache.cassandra.db.filter.QueryFilter;
import org.apache.cassandra.dht.BytesToken;
import org.apache.cassandra.locator.TokenMetadata;
import org.apache.cassandra.service.CacheService;
import org.apache.cassandra.service.StorageService;
import org.apache.cassandra.utils.ByteBufferUtil;
import static org.junit.Assert.assertEquals;
public class RowCacheTest extends SchemaLoader
{
private String KEYSPACE = "RowCacheSpace";
private String COLUMN_FAMILY = "CachedCF";
@AfterClass
public static void cleanup()
{
cleanupSavedCaches();
}
@Test
public void testRowCache() throws Exception
{
CompactionManager.instance.disableAutoCompaction();
Keyspace keyspace = Keyspace.open(KEYSPACE);
ColumnFamilyStore cachedStore = keyspace.getColumnFamilyStore(COLUMN_FAMILY);
// empty the row cache
CacheService.instance.invalidateRowCache();
// set global row cache size to 1 MB
CacheService.instance.setRowCacheCapacityInMB(1);
// inserting 100 rows into both column families
insertData(KEYSPACE, COLUMN_FAMILY, 0, 100);
// now reading rows one by one and checking if row change grows
for (int i = 0; i < 100; i++)
{
DecoratedKey key = Util.dk("key" + i);
cachedStore.getColumnFamily(key, Composites.EMPTY, Composites.EMPTY, false, 1, System.currentTimeMillis());
assert CacheService.instance.rowCache.size() == i + 1;
assert cachedStore.containsCachedRow(key); // current key should be stored in the cache
// checking if cell is read correctly after cache
ColumnFamily cf = cachedStore.getColumnFamily(key, Composites.EMPTY, Composites.EMPTY, false, 1, System.currentTimeMillis());
Collection<Cell> cells = cf.getSortedColumns();
Cell cell = cells.iterator().next();
assert cells.size() == 1;
assert cell.name().toByteBuffer().equals(ByteBufferUtil.bytes("col" + i));
assert cell.value().equals(ByteBufferUtil.bytes("val" + i));
}
// insert 10 more keys
insertData(KEYSPACE, COLUMN_FAMILY, 100, 10);
for (int i = 100; i < 110; i++)
{
DecoratedKey key = Util.dk("key" + i);
cachedStore.getColumnFamily(key, Composites.EMPTY, Composites.EMPTY, false, 1, System.currentTimeMillis());
assert cachedStore.containsCachedRow(key); // cache should be populated with the latest rows read (old ones should be popped)
// checking if cell is read correctly after cache
ColumnFamily cf = cachedStore.getColumnFamily(key, Composites.EMPTY, Composites.EMPTY, false, 1, System.currentTimeMillis());
Collection<Cell> cells = cf.getSortedColumns();
Cell cell = cells.iterator().next();
assert cells.size() == 1;
assert cell.name().toByteBuffer().equals(ByteBufferUtil.bytes("col" + i));
assert cell.value().equals(ByteBufferUtil.bytes("val" + i));
}
// clear 100 rows from the cache
int keysLeft = 109;
for (int i = 109; i >= 10; i--)
{
cachedStore.invalidateCachedRow(Util.dk("key" + i));
assert CacheService.instance.rowCache.size() == keysLeft;
keysLeft--;
}
CacheService.instance.setRowCacheCapacityInMB(0);
}
@Test
public void testRowCacheLoad() throws Exception
{
CacheService.instance.setRowCacheCapacityInMB(1);
rowCacheLoad(100, Integer.MAX_VALUE, 0);
CacheService.instance.setRowCacheCapacityInMB(0);
}
@Test
public void testRowCacheCleanup() throws Exception
{
StorageService.instance.initServer(0);
CacheService.instance.setRowCacheCapacityInMB(1);
rowCacheLoad(100, Integer.MAX_VALUE, 1000);
ColumnFamilyStore store = Keyspace.open(KEYSPACE).getColumnFamilyStore(COLUMN_FAMILY);
assertEquals(CacheService.instance.rowCache.getKeySet().size(), 100);
store.cleanupCache();
assertEquals(CacheService.instance.rowCache.getKeySet().size(), 100);
TokenMetadata tmd = StorageService.instance.getTokenMetadata();
byte[] tk1, tk2;
tk1 = "key1000".getBytes();
tk2 = "key1050".getBytes();
tmd.updateNormalToken(new BytesToken(tk1), InetAddress.getByName("127.0.0.1"));
tmd.updateNormalToken(new BytesToken(tk2), InetAddress.getByName("127.0.0.2"));
store.cleanupCache();
assertEquals(CacheService.instance.rowCache.getKeySet().size(), 50);
CacheService.instance.setRowCacheCapacityInMB(0);
}
@Test
public void testRowCachePartialLoad() throws Exception
{
CacheService.instance.setRowCacheCapacityInMB(1);
rowCacheLoad(100, 50, 0);
CacheService.instance.setRowCacheCapacityInMB(0);
}
@Test
public void testRowCacheRange()
{
CompactionManager.instance.disableAutoCompaction();
Keyspace keyspace = Keyspace.open(KEYSPACE);
String cf = "CachedIntCF";
ColumnFamilyStore cachedStore = keyspace.getColumnFamilyStore(cf);
long startRowCacheHits = cachedStore.metric.rowCacheHit.count();
long startRowCacheOutOfRange = cachedStore.metric.rowCacheHitOutOfRange.count();
// empty the row cache
CacheService.instance.invalidateRowCache();
// set global row cache size to 1 MB
CacheService.instance.setRowCacheCapacityInMB(1);
ByteBuffer key = ByteBufferUtil.bytes("rowcachekey");
DecoratedKey dk = cachedStore.partitioner.decorateKey(key);
RowCacheKey rck = new RowCacheKey(cachedStore.metadata.cfId, dk);
Mutation mutation = new Mutation(KEYSPACE, key);
for (int i = 0; i < 200; i++)
mutation.add(cf, Util.cellname(i), ByteBufferUtil.bytes("val" + i), System.currentTimeMillis());
mutation.applyUnsafe();
// populate row cache, we should not get a row cache hit;
cachedStore.getColumnFamily(QueryFilter.getSliceFilter(dk, cf,
Composites.EMPTY,
Composites.EMPTY,
false, 10, System.currentTimeMillis()));
assertEquals(startRowCacheHits, cachedStore.metric.rowCacheHit.count());
// do another query, limit is 20, which is < 100 that we cache, we should get a hit and it should be in range
cachedStore.getColumnFamily(QueryFilter.getSliceFilter(dk, cf,
Composites.EMPTY,
Composites.EMPTY,
false, 20, System.currentTimeMillis()));
assertEquals(++startRowCacheHits, cachedStore.metric.rowCacheHit.count());
assertEquals(startRowCacheOutOfRange, cachedStore.metric.rowCacheHitOutOfRange.count());
// get a slice from 95 to 105, 95->99 are in cache, we should not get a hit and then row cache is out of range
cachedStore.getColumnFamily(QueryFilter.getSliceFilter(dk, cf,
CellNames.simpleDense(ByteBufferUtil.bytes(95)),
CellNames.simpleDense(ByteBufferUtil.bytes(105)),
false, 10, System.currentTimeMillis()));
assertEquals(startRowCacheHits, cachedStore.metric.rowCacheHit.count());
assertEquals(++startRowCacheOutOfRange, cachedStore.metric.rowCacheHitOutOfRange.count());
// get a slice with limit > 100, we should get a hit out of range.
cachedStore.getColumnFamily(QueryFilter.getSliceFilter(dk, cf,
Composites.EMPTY,
Composites.EMPTY,
false, 101, System.currentTimeMillis()));
assertEquals(startRowCacheHits, cachedStore.metric.rowCacheHit.count());
assertEquals(++startRowCacheOutOfRange, cachedStore.metric.rowCacheHitOutOfRange.count());
CacheService.instance.invalidateRowCache();
// try to populate row cache with a limit > rows to cache, we should still populate row cache;
cachedStore.getColumnFamily(QueryFilter.getSliceFilter(dk, cf,
Composites.EMPTY,
Composites.EMPTY,
false, 105, System.currentTimeMillis()));
assertEquals(startRowCacheHits, cachedStore.metric.rowCacheHit.count());
// validate the stuff in cache;
ColumnFamily cachedCf = (ColumnFamily)CacheService.instance.rowCache.get(rck);
assertEquals(cachedCf.getColumnCount(), 100);
int i = 0;
for(Cell c : cachedCf)
{
assertEquals(c.name(), Util.cellname(i++));
}
}
public void rowCacheLoad(int totalKeys, int keysToSave, int offset) throws Exception
{
CompactionManager.instance.disableAutoCompaction();
ColumnFamilyStore store = Keyspace.open(KEYSPACE).getColumnFamilyStore(COLUMN_FAMILY);
// empty the cache
CacheService.instance.invalidateRowCache();
assert CacheService.instance.rowCache.size() == 0;
// insert data and fill the cache
insertData(KEYSPACE, COLUMN_FAMILY, offset, totalKeys);
readData(KEYSPACE, COLUMN_FAMILY, offset, totalKeys);
assert CacheService.instance.rowCache.size() == totalKeys;
// force the cache to disk
CacheService.instance.rowCache.submitWrite(keysToSave).get();
// empty the cache again to make sure values came from disk
CacheService.instance.invalidateRowCache();
assert CacheService.instance.rowCache.size() == 0;
assert CacheService.instance.rowCache.loadSaved(store) == (keysToSave == Integer.MAX_VALUE ? totalKeys : keysToSave);
}
}