001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.regionserver; 019 020import static org.junit.Assert.assertEquals; 021 022import java.io.IOException; 023import java.util.ArrayList; 024import org.apache.hadoop.conf.Configuration; 025import org.apache.hadoop.hbase.CacheEvictionStats; 026import org.apache.hadoop.hbase.Cell; 027import org.apache.hadoop.hbase.HBaseClassTestRule; 028import org.apache.hadoop.hbase.HBaseTestingUtility; 029import org.apache.hadoop.hbase.HConstants; 030import org.apache.hadoop.hbase.MiniHBaseCluster; 031import org.apache.hadoop.hbase.TableName; 032import org.apache.hadoop.hbase.client.Admin; 033import org.apache.hadoop.hbase.client.AsyncAdmin; 034import org.apache.hadoop.hbase.client.ConnectionFactory; 035import org.apache.hadoop.hbase.client.Scan; 036import org.apache.hadoop.hbase.client.Table; 037import org.apache.hadoop.hbase.io.hfile.BlockCache; 038import org.apache.hadoop.hbase.testclassification.MediumTests; 039import org.apache.hadoop.hbase.util.Bytes; 040import org.junit.After; 041import org.junit.Before; 042import org.junit.ClassRule; 043import org.junit.Test; 044import org.junit.experimental.categories.Category; 045import org.junit.runner.RunWith; 046import org.junit.runners.Parameterized; 047import org.slf4j.Logger; 048import org.slf4j.LoggerFactory; 049 050@Category(MediumTests.class) 051@RunWith(Parameterized.class) 052public class TestClearRegionBlockCache { 053 054 @ClassRule 055 public static final HBaseClassTestRule CLASS_RULE = 056 HBaseClassTestRule.forClass(TestClearRegionBlockCache.class); 057 058 private static final Logger LOG = LoggerFactory.getLogger(TestClearRegionBlockCache.class); 059 private static final TableName TABLE_NAME = TableName.valueOf("testClearRegionBlockCache"); 060 private static final byte[] FAMILY = Bytes.toBytes("family"); 061 private static final byte[][] SPLIT_KEY = new byte[][] { Bytes.toBytes("5") }; 062 private static final int NUM_MASTERS = 1; 063 private static final int NUM_RS = 2; 064 065 private final HBaseTestingUtility HTU = new HBaseTestingUtility(); 066 067 private Configuration CONF = HTU.getConfiguration(); 068 private Table table; 069 private HRegionServer rs1, rs2; 070 private MiniHBaseCluster cluster; 071 072 @Parameterized.Parameter public String cacheType; 073 074 @Parameterized.Parameters(name = "{index}: {0}") 075 public static Object[] data() { 076 return new Object[] { "lru", "bucket" }; 077 } 078 079 @Before 080 public void setup() throws Exception { 081 if (cacheType.equals("bucket")) { 082 CONF.set(HConstants.BUCKET_CACHE_IOENGINE_KEY, "offheap"); 083 CONF.setInt(HConstants.BUCKET_CACHE_SIZE_KEY, 30); 084 } 085 086 cluster = HTU.startMiniCluster(NUM_MASTERS, NUM_RS); 087 rs1 = cluster.getRegionServer(0); 088 rs2 = cluster.getRegionServer(1); 089 090 // Create table 091 table = HTU.createTable(TABLE_NAME, FAMILY, SPLIT_KEY); 092 093 HTU.loadNumericRows(table, FAMILY, 1, 10); 094 HTU.flush(TABLE_NAME); 095 } 096 097 @After 098 public void teardown() throws Exception { 099 HTU.shutdownMiniCluster(); 100 } 101 102 @Test 103 public void testClearBlockCache() throws Exception { 104 BlockCache blockCache1 = rs1.getCacheConfig().getBlockCache(); 105 BlockCache blockCache2 = rs2.getCacheConfig().getBlockCache(); 106 107 long initialBlockCount1 = blockCache1.getBlockCount(); 108 long initialBlockCount2 = blockCache2.getBlockCount(); 109 110 // scan will cause blocks to be added in BlockCache 111 scanAllRegionsForRS(rs1); 112 assertEquals(blockCache1.getBlockCount() - initialBlockCount1, 113 HTU.getNumHFilesForRS(rs1, TABLE_NAME, FAMILY)); 114 clearRegionBlockCache(rs1); 115 116 scanAllRegionsForRS(rs2); 117 assertEquals(blockCache2.getBlockCount() - initialBlockCount2, 118 HTU.getNumHFilesForRS(rs2, TABLE_NAME, FAMILY)); 119 clearRegionBlockCache(rs2); 120 121 assertEquals(initialBlockCount1, blockCache1.getBlockCount()); 122 assertEquals(initialBlockCount2, blockCache2.getBlockCount()); 123 } 124 125 @Test 126 public void testClearBlockCacheFromAdmin() throws Exception { 127 Admin admin = HTU.getAdmin(); 128 129 // All RS run in a same process, so the block cache is same for rs1 and rs2 130 BlockCache blockCache = rs1.getCacheConfig().getBlockCache(); 131 long initialBlockCount = blockCache.getBlockCount(); 132 133 // scan will cause blocks to be added in BlockCache 134 scanAllRegionsForRS(rs1); 135 assertEquals(blockCache.getBlockCount() - initialBlockCount, 136 HTU.getNumHFilesForRS(rs1, TABLE_NAME, FAMILY)); 137 scanAllRegionsForRS(rs2); 138 assertEquals(blockCache.getBlockCount() - initialBlockCount, 139 HTU.getNumHFilesForRS(rs1, TABLE_NAME, FAMILY) 140 + HTU.getNumHFilesForRS(rs2, TABLE_NAME, FAMILY)); 141 142 CacheEvictionStats stats = admin.clearBlockCache(TABLE_NAME); 143 assertEquals(stats.getEvictedBlocks(), HTU.getNumHFilesForRS(rs1, TABLE_NAME, FAMILY) 144 + HTU.getNumHFilesForRS(rs2, TABLE_NAME, FAMILY)); 145 assertEquals(initialBlockCount, blockCache.getBlockCount()); 146 } 147 148 @Test 149 public void testClearBlockCacheFromAsyncAdmin() throws Exception { 150 AsyncAdmin admin = 151 ConnectionFactory.createAsyncConnection(HTU.getConfiguration()).get().getAdmin(); 152 153 // All RS run in a same process, so the block cache is same for rs1 and rs2 154 BlockCache blockCache = rs1.getCacheConfig().getBlockCache(); 155 long initialBlockCount = blockCache.getBlockCount(); 156 157 // scan will cause blocks to be added in BlockCache 158 scanAllRegionsForRS(rs1); 159 assertEquals(blockCache.getBlockCount() - initialBlockCount, 160 HTU.getNumHFilesForRS(rs1, TABLE_NAME, FAMILY)); 161 scanAllRegionsForRS(rs2); 162 assertEquals(blockCache.getBlockCount() - initialBlockCount, 163 HTU.getNumHFilesForRS(rs1, TABLE_NAME, FAMILY) 164 + HTU.getNumHFilesForRS(rs2, TABLE_NAME, FAMILY)); 165 166 CacheEvictionStats stats = admin.clearBlockCache(TABLE_NAME).get(); 167 assertEquals(stats.getEvictedBlocks(), HTU.getNumHFilesForRS(rs1, TABLE_NAME, FAMILY) 168 + HTU.getNumHFilesForRS(rs2, TABLE_NAME, FAMILY)); 169 assertEquals(initialBlockCount, blockCache.getBlockCount()); 170 } 171 172 private void scanAllRegionsForRS(HRegionServer rs) throws IOException { 173 for (Region region : rs.getRegions(TABLE_NAME)) { 174 RegionScanner scanner = region.getScanner(new Scan()); 175 while (scanner.next(new ArrayList<Cell>())); 176 } 177 } 178 179 private void clearRegionBlockCache(HRegionServer rs) { 180 for (Region region : rs.getRegions(TABLE_NAME)) { 181 rs.clearRegionBlockCache(region); 182 } 183 } 184}