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.apache.hadoop.hbase.HBaseTestCase.addContent; 021import static org.junit.Assert.assertEquals; 022 023import java.util.ArrayList; 024import java.util.List; 025 026import org.apache.hadoop.conf.Configuration; 027import org.apache.hadoop.fs.Path; 028import org.apache.hadoop.hbase.Cell; 029import org.apache.hadoop.hbase.HBaseClassTestRule; 030import org.apache.hadoop.hbase.HBaseTestingUtility; 031import org.apache.hadoop.hbase.HColumnDescriptor; 032import org.apache.hadoop.hbase.HTableDescriptor; 033import org.apache.hadoop.hbase.KeyValueUtil; 034import org.apache.hadoop.hbase.TableName; 035import org.apache.hadoop.hbase.client.RegionInfo; 036import org.apache.hadoop.hbase.client.RegionInfoBuilder; 037import org.apache.hadoop.hbase.client.Scan; 038import org.apache.hadoop.hbase.client.TableDescriptor; 039import org.apache.hadoop.hbase.io.compress.Compression; 040import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding; 041import org.apache.hadoop.hbase.io.hfile.BlockCache; 042import org.apache.hadoop.hbase.io.hfile.BlockCacheFactory; 043import org.apache.hadoop.hbase.io.hfile.CacheStats; 044import org.apache.hadoop.hbase.testclassification.RegionServerTests; 045import org.apache.hadoop.hbase.testclassification.SmallTests; 046import org.apache.hadoop.hbase.util.Bytes; 047import org.junit.Before; 048import org.junit.ClassRule; 049import org.junit.Test; 050import org.junit.experimental.categories.Category; 051 052@SuppressWarnings("deprecation") 053@Category({RegionServerTests.class, SmallTests.class}) 054public class TestBlocksScanned { 055 056 @ClassRule 057 public static final HBaseClassTestRule CLASS_RULE = 058 HBaseClassTestRule.forClass(TestBlocksScanned.class); 059 060 private static byte [] FAMILY = Bytes.toBytes("family"); 061 private static byte [] COL = Bytes.toBytes("col"); 062 private static byte [] START_KEY = Bytes.toBytes("aaa"); 063 private static byte [] END_KEY = Bytes.toBytes("zzz"); 064 private static int BLOCK_SIZE = 70; 065 066 private static HBaseTestingUtility TEST_UTIL = null; 067 private Configuration conf; 068 private Path testDir; 069 070 @Before 071 public void setUp() throws Exception { 072 TEST_UTIL = new HBaseTestingUtility(); 073 conf = TEST_UTIL.getConfiguration(); 074 testDir = TEST_UTIL.getDataTestDir("TestBlocksScanned"); 075 } 076 077 @Test 078 public void testBlocksScanned() throws Exception { 079 byte [] tableName = Bytes.toBytes("TestBlocksScanned"); 080 HTableDescriptor table = new HTableDescriptor(TableName.valueOf(tableName)); 081 082 table.addFamily( 083 new HColumnDescriptor(FAMILY) 084 .setMaxVersions(10) 085 .setBlockCacheEnabled(true) 086 .setBlocksize(BLOCK_SIZE) 087 .setCompressionType(Compression.Algorithm.NONE) 088 ); 089 _testBlocksScanned(table); 090 } 091 092 @Test 093 public void testBlocksScannedWithEncoding() throws Exception { 094 byte [] tableName = Bytes.toBytes("TestBlocksScannedWithEncoding"); 095 HTableDescriptor table = new HTableDescriptor(TableName.valueOf(tableName)); 096 097 table.addFamily( 098 new HColumnDescriptor(FAMILY) 099 .setMaxVersions(10) 100 .setBlockCacheEnabled(true) 101 .setDataBlockEncoding(DataBlockEncoding.FAST_DIFF) 102 .setBlocksize(BLOCK_SIZE) 103 .setCompressionType(Compression.Algorithm.NONE) 104 ); 105 _testBlocksScanned(table); 106 } 107 108 private void _testBlocksScanned(TableDescriptor td) throws Exception { 109 BlockCache blockCache = BlockCacheFactory.createBlockCache(conf); 110 RegionInfo regionInfo = 111 RegionInfoBuilder.newBuilder(td.getTableName()).setStartKey(START_KEY).setEndKey(END_KEY) 112 .build(); 113 HRegion r = HBaseTestingUtility.createRegionAndWAL(regionInfo, testDir, conf, td, blockCache); 114 addContent(r, FAMILY, COL); 115 r.flush(true); 116 117 CacheStats stats = blockCache.getStats(); 118 long before = stats.getHitCount() + stats.getMissCount(); 119 // Do simple test of getting one row only first. 120 Scan scan = new Scan().withStartRow(Bytes.toBytes("aaa")).withStopRow(Bytes.toBytes("aaz")) 121 .setReadType(Scan.ReadType.PREAD); 122 scan.addColumn(FAMILY, COL); 123 scan.setMaxVersions(1); 124 125 InternalScanner s = r.getScanner(scan); 126 List<Cell> results = new ArrayList<>(); 127 while (s.next(results)); 128 s.close(); 129 130 int expectResultSize = 'z' - 'a'; 131 assertEquals(expectResultSize, results.size()); 132 133 int kvPerBlock = (int) Math.ceil(BLOCK_SIZE / 134 (double) KeyValueUtil.ensureKeyValue(results.get(0)).getLength()); 135 assertEquals(2, kvPerBlock); 136 137 long expectDataBlockRead = (long) Math.ceil(expectResultSize / (double) kvPerBlock); 138 long expectIndexBlockRead = expectDataBlockRead; 139 140 assertEquals(expectIndexBlockRead + expectDataBlockRead, 141 stats.getHitCount() + stats.getMissCount() - before); 142 } 143}