hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestBlocksScanned.java

   1 /*
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.regionserver;
  19
  20 import static org.apache.hadoop.hbase.HBaseTestCase.addContent;
  21 import static org.junit.Assert.assertEquals;
  22
  23 import java.util.ArrayList;
  24 import java.util.List;
  25
  26 import org.apache.hadoop.conf.Configuration;
  27 import org.apache.hadoop.fs.Path;
  28 import org.apache.hadoop.hbase.Cell;
  29 import org.apache.hadoop.hbase.HBaseClassTestRule;
  30 import org.apache.hadoop.hbase.HBaseTestingUtility;
  31 import org.apache.hadoop.hbase.KeyValueUtil;
  32 import org.apache.hadoop.hbase.TableName;
  33 import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
  34 import org.apache.hadoop.hbase.client.RegionInfo;
  35 import org.apache.hadoop.hbase.client.RegionInfoBuilder;
  36 import org.apache.hadoop.hbase.client.Scan;
  37 import org.apache.hadoop.hbase.client.TableDescriptor;
  38 import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
  39 import org.apache.hadoop.hbase.io.compress.Compression;
  40 import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
  41 import org.apache.hadoop.hbase.io.hfile.BlockCache;
  42 import org.apache.hadoop.hbase.io.hfile.BlockCacheFactory;
  43 import org.apache.hadoop.hbase.io.hfile.CacheStats;
  44 import org.apache.hadoop.hbase.testclassification.RegionServerTests;
  45 import org.apache.hadoop.hbase.testclassification.SmallTests;
  46 import org.apache.hadoop.hbase.util.Bytes;
  47 import org.junit.Before;
  48 import org.junit.ClassRule;
  49 import org.junit.Test;
  50 import org.junit.experimental.categories.Category;
  51
  52 @SuppressWarnings("deprecation")
  53 @Category({RegionServerTests.class, SmallTests.class})
  54 public class TestBlocksScanned {
  55
  56   @ClassRule
  57   public static final HBaseClassTestRule CLASS_RULE =
  58       HBaseClassTestRule.forClass(TestBlocksScanned.class);
  59
  60   private static byte [] FAMILY = Bytes.toBytes("family");
  61   private static byte [] COL = Bytes.toBytes("col");
  62   private static byte [] START_KEY = Bytes.toBytes("aaa");
  63   private static byte [] END_KEY = Bytes.toBytes("zzz");
  64   private static int BLOCK_SIZE = 70;
  65
  66   private static HBaseTestingUtility TEST_UTIL = null;
  67   private Configuration conf;
  68   private Path testDir;
  69
  70   @Before
  71   public void setUp() throws Exception {
  72     TEST_UTIL = new HBaseTestingUtility();
  73     conf = TEST_UTIL.getConfiguration();
  74     testDir = TEST_UTIL.getDataTestDir("TestBlocksScanned");
  75   }
  76
  77   @Test
  78   public void testBlocksScanned() throws Exception {
  79     byte [] tableName = Bytes.toBytes("TestBlocksScanned");
  80     TableDescriptorBuilder.ModifyableTableDescriptor tableDescriptor =
  81       new TableDescriptorBuilder.ModifyableTableDescriptor(TableName.valueOf(tableName));
  82
  83     tableDescriptor.setColumnFamily(
  84         new ColumnFamilyDescriptorBuilder.ModifyableColumnFamilyDescriptor(FAMILY)
  85         .setMaxVersions(10)
  86         .setBlockCacheEnabled(true)
  87         .setBlocksize(BLOCK_SIZE)
  88         .setCompressionType(Compression.Algorithm.NONE)
  89         );
  90     _testBlocksScanned(tableDescriptor);
  91   }
  92
  93   @Test
  94   public void testBlocksScannedWithEncoding() throws Exception {
  95     byte [] tableName = Bytes.toBytes("TestBlocksScannedWithEncoding");
  96     TableDescriptorBuilder.ModifyableTableDescriptor tableDescriptor =
  97       new TableDescriptorBuilder.ModifyableTableDescriptor(TableName.valueOf(tableName));
  98
  99     tableDescriptor.setColumnFamily(
 100         new ColumnFamilyDescriptorBuilder.ModifyableColumnFamilyDescriptor(FAMILY)
 101         .setMaxVersions(10)
 102         .setBlockCacheEnabled(true)
 103         .setDataBlockEncoding(DataBlockEncoding.FAST_DIFF)
 104         .setBlocksize(BLOCK_SIZE)
 105         .setCompressionType(Compression.Algorithm.NONE)
 106         );
 107     _testBlocksScanned(tableDescriptor);
 108   }
 109
 110   private void _testBlocksScanned(TableDescriptor td) throws Exception {
 111     BlockCache blockCache = BlockCacheFactory.createBlockCache(conf);
 112     RegionInfo regionInfo =
 113         RegionInfoBuilder.newBuilder(td.getTableName()).setStartKey(START_KEY).setEndKey(END_KEY)
 114             .build();
 115     HRegion r = HBaseTestingUtility.createRegionAndWAL(regionInfo, testDir, conf, td, blockCache);
 116     addContent(r, FAMILY, COL);
 117     r.flush(true);
 118
 119     CacheStats stats = blockCache.getStats();
 120     long before = stats.getHitCount() + stats.getMissCount();
 121     // Do simple test of getting one row only first.
 122     Scan scan = new Scan().withStartRow(Bytes.toBytes("aaa")).withStopRow(Bytes.toBytes("aaz"))
 123         .setReadType(Scan.ReadType.PREAD);
 124     scan.addColumn(FAMILY, COL);
 125     scan.readVersions(1);
 126
 127     InternalScanner s = r.getScanner(scan);
 128     List<Cell> results = new ArrayList<>();
 129     while (s.next(results));
 130     s.close();
 131
 132     int expectResultSize = 'z' - 'a';
 133     assertEquals(expectResultSize, results.size());
 134
 135     int kvPerBlock = (int) Math.ceil(BLOCK_SIZE /
 136         (double) KeyValueUtil.ensureKeyValue(results.get(0)).getLength());
 137     assertEquals(2, kvPerBlock);
 138
 139     long expectDataBlockRead = (long) Math.ceil(expectResultSize / (double) kvPerBlock);
 140     long expectIndexBlockRead = expectDataBlockRead;
 141
 142     assertEquals(expectIndexBlockRead + expectDataBlockRead,
 143         stats.getHitCount() + stats.getMissCount() - before);
 144   }
 145 }