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.HTestConst.addContent;
  21 import static org.junit.Assert.assertEquals;
  22
  23 import java.util.ArrayList;
  24 import java.util.List;
  25 import org.apache.hadoop.conf.Configuration;
  26 import org.apache.hadoop.fs.Path;
  27 import org.apache.hadoop.hbase.Cell;
  28 import org.apache.hadoop.hbase.HBaseClassTestRule;
  29 import org.apache.hadoop.hbase.HBaseTestingUtil;
  30 import org.apache.hadoop.hbase.KeyValueUtil;
  31 import org.apache.hadoop.hbase.TableName;
  32 import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
  33 import org.apache.hadoop.hbase.client.RegionInfo;
  34 import org.apache.hadoop.hbase.client.RegionInfoBuilder;
  35 import org.apache.hadoop.hbase.client.Scan;
  36 import org.apache.hadoop.hbase.client.TableDescriptor;
  37 import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
  38 import org.apache.hadoop.hbase.io.compress.Compression;
  39 import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
  40 import org.apache.hadoop.hbase.io.hfile.BlockCache;
  41 import org.apache.hadoop.hbase.io.hfile.BlockCacheFactory;
  42 import org.apache.hadoop.hbase.io.hfile.CacheStats;
  43 import org.apache.hadoop.hbase.testclassification.RegionServerTests;
  44 import org.apache.hadoop.hbase.testclassification.SmallTests;
  45 import org.apache.hadoop.hbase.util.Bytes;
  46 import org.junit.Before;
  47 import org.junit.ClassRule;
  48 import org.junit.Test;
  49 import org.junit.experimental.categories.Category;
  50
  51 @SuppressWarnings("deprecation")
  52 @Category({RegionServerTests.class, SmallTests.class})
  53 public class TestBlocksScanned {
  54
  55   @ClassRule
  56   public static final HBaseClassTestRule CLASS_RULE =
  57       HBaseClassTestRule.forClass(TestBlocksScanned.class);
  58
  59   private static byte [] FAMILY = Bytes.toBytes("family");
  60   private static byte [] COL = Bytes.toBytes("col");
  61   private static byte [] START_KEY = Bytes.toBytes("aaa");
  62   private static byte [] END_KEY = Bytes.toBytes("zzz");
  63   private static int BLOCK_SIZE = 70;
  64
  65   private static HBaseTestingUtil TEST_UTIL = null;
  66   private Configuration conf;
  67   private Path testDir;
  68
  69   @Before
  70   public void setUp() throws Exception {
  71     TEST_UTIL = new HBaseTestingUtil();
  72     conf = TEST_UTIL.getConfiguration();
  73     testDir = TEST_UTIL.getDataTestDir("TestBlocksScanned");
  74   }
  75
  76   @Test
  77   public void testBlocksScanned() throws Exception {
  78     byte[] tableName = Bytes.toBytes("TestBlocksScanned");
  79     TableDescriptor tableDescriptor =
  80       TableDescriptorBuilder.newBuilder(TableName.valueOf(tableName))
  81         .setColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(FAMILY).setMaxVersions(10)
  82           .setBlockCacheEnabled(true).setBlocksize(BLOCK_SIZE)
  83           .setCompressionType(Compression.Algorithm.NONE).build())
  84         .build();
  85     _testBlocksScanned(tableDescriptor);
  86   }
  87
  88   @Test
  89   public void testBlocksScannedWithEncoding() throws Exception {
  90     byte[] tableName = Bytes.toBytes("TestBlocksScannedWithEncoding");
  91     TableDescriptor tableDescriptor =
  92       TableDescriptorBuilder.newBuilder(TableName.valueOf(tableName))
  93         .setColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(FAMILY).setMaxVersions(10)
  94           .setBlockCacheEnabled(true).setDataBlockEncoding(DataBlockEncoding.FAST_DIFF)
  95           .setBlocksize(BLOCK_SIZE).setCompressionType(Compression.Algorithm.NONE).build())
  96         .build();
  97     _testBlocksScanned(tableDescriptor);
  98   }
  99
 100   private void _testBlocksScanned(TableDescriptor td) throws Exception {
 101     BlockCache blockCache = BlockCacheFactory.createBlockCache(conf);
 102     RegionInfo regionInfo =
 103         RegionInfoBuilder.newBuilder(td.getTableName()).setStartKey(START_KEY).setEndKey(END_KEY)
 104             .build();
 105     HRegion r = HBaseTestingUtil.createRegionAndWAL(regionInfo, testDir, conf, td, blockCache);
 106     addContent(r, FAMILY, COL);
 107     r.flush(true);
 108
 109     CacheStats stats = blockCache.getStats();
 110     long before = stats.getHitCount() + stats.getMissCount();
 111     // Do simple test of getting one row only first.
 112     Scan scan = new Scan().withStartRow(Bytes.toBytes("aaa")).withStopRow(Bytes.toBytes("aaz"))
 113         .setReadType(Scan.ReadType.PREAD);
 114     scan.addColumn(FAMILY, COL);
 115     scan.readVersions(1);
 116
 117     InternalScanner s = r.getScanner(scan);
 118     List<Cell> results = new ArrayList<>();
 119     while (s.next(results));
 120     s.close();
 121
 122     int expectResultSize = 'z' - 'a';
 123     assertEquals(expectResultSize, results.size());
 124
 125     int kvPerBlock = (int) Math.ceil(BLOCK_SIZE /
 126         (double) KeyValueUtil.ensureKeyValue(results.get(0)).getLength());
 127     assertEquals(2, kvPerBlock);
 128
 129     long expectDataBlockRead = (long) Math.ceil(expectResultSize / (double) kvPerBlock);
 130     long expectIndexBlockRead = expectDataBlockRead;
 131
 132     assertEquals(expectIndexBlockRead + expectDataBlockRead,
 133         stats.getHitCount() + stats.getMissCount() - before);
 134   }
 135 }