@Test
public void testRowCacheRange() {
CompactionManager.instance.disableAutoCompaction();
Keyspace keyspace = Keyspace.open(KEYSPACE_CACHED);
String cf = "CachedIntCF";
ColumnFamilyStore cachedStore = keyspace.getColumnFamilyStore(cf);
long startRowCacheHits = cachedStore.metric.rowCacheHit.getCount();
long startRowCacheOutOfRange = cachedStore.metric.rowCacheHitOutOfRange.getCount();
// 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.ksAndCFName, dk);
Mutation mutation = new Mutation(KEYSPACE_CACHED, 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.getCount());
// 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.getCount());
assertEquals(startRowCacheOutOfRange, cachedStore.metric.rowCacheHitOutOfRange.getCount());
// 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.getCount());
assertEquals(++startRowCacheOutOfRange, cachedStore.metric.rowCacheHitOutOfRange.getCount());
// 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.getCount());
assertEquals(++startRowCacheOutOfRange, cachedStore.metric.rowCacheHitOutOfRange.getCount());
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.getCount());
// 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++));
}
}
@Test
public void testRowCache() throws Exception {
CompactionManager.instance.disableAutoCompaction();
Keyspace keyspace = Keyspace.open(KEYSPACE_CACHED);
ColumnFamilyStore cachedStore = keyspace.getColumnFamilyStore(CF_CACHED);
// 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
SchemaLoader.insertData(KEYSPACE_CACHED, CF_CACHED, 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
SchemaLoader.insertData(KEYSPACE_CACHED, CF_CACHED, 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);
}
public static ColumnFamily getColumnFamily(Keyspace keyspace, DecoratedKey key, String cfName) {
ColumnFamilyStore cfStore = keyspace.getColumnFamilyStore(cfName);
assert cfStore != null : "Table " + cfName + " has not been defined";
return cfStore.getColumnFamily(
QueryFilter.getIdentityFilter(key, cfName, System.currentTimeMillis()));
}