package org.apache.cassandra.db; /* * * 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. * */ import java.io.IOException; import java.nio.ByteBuffer; import org.junit.Test; import org.apache.cassandra.SchemaLoader; import org.apache.cassandra.config.CFMetaData; import org.apache.cassandra.exceptions.ConfigurationException; import org.apache.cassandra.db.marshal.UTF8Type; import org.apache.cassandra.service.MigrationManager; import org.apache.cassandra.utils.ByteBufferUtil; public class MeteredFlusherTest extends SchemaLoader { @Test public void testManyMemtables() throws IOException, ConfigurationException { Keyspace keyspace = Keyspace.open("Keyspace1"); for (int i = 0; i < 100; i++) { CFMetaData metadata = new CFMetaData(keyspace.getName(), "_CF" + i, ColumnFamilyType.Standard, UTF8Type.instance, null); MigrationManager.announceNewColumnFamily(metadata); } ByteBuffer name = ByteBufferUtil.bytes("c"); for (int j = 0; j < 200; j++) { for (int i = 0; i < 100; i++) { RowMutation rm = new RowMutation("Keyspace1", ByteBufferUtil.bytes("key" + j)); ColumnFamily cf = TreeMapBackedSortedColumns.factory.create("Keyspace1", "_CF" + i); // don't cheat by allocating this outside of the loop; that defeats the purpose of deliberately using lots of memory ByteBuffer value = ByteBuffer.allocate(100000); cf.addColumn(new Column(name, value)); rm.add(cf); rm.applyUnsafe(); } } int flushes = 0; for (ColumnFamilyStore cfs : ColumnFamilyStore.all()) { if (cfs.name.startsWith("_CF")) flushes += cfs.getMemtableSwitchCount(); } assert flushes > 0; } }