| package org.apache.solr.store.blockcache; |
| |
| /* |
| * 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.util.Arrays; |
| import java.util.Random; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.junit.Test; |
| |
| public class BlockCacheTest extends LuceneTestCase { |
| @Test |
| public void testBlockCache() { |
| int blocksInTest = 2000000; |
| int blockSize = 1024; |
| |
| int slabSize = blockSize * 4096; |
| long totalMemory = 2 * slabSize; |
| |
| BlockCache blockCache = new BlockCache(new Metrics(new Configuration()), true,totalMemory,slabSize,blockSize); |
| byte[] buffer = new byte[1024]; |
| Random random = random(); |
| byte[] newData = new byte[blockSize]; |
| AtomicLong hitsInCache = new AtomicLong(); |
| AtomicLong missesInCache = new AtomicLong(); |
| long storeTime = 0; |
| long fetchTime = 0; |
| int passes = 10000; |
| |
| BlockCacheKey blockCacheKey = new BlockCacheKey(); |
| |
| for (int j = 0; j < passes; j++) { |
| long block = random.nextInt(blocksInTest); |
| int file = 0; |
| blockCacheKey.setBlock(block); |
| blockCacheKey.setFile(file); |
| |
| if (blockCache.fetch(blockCacheKey, buffer)) { |
| hitsInCache.incrementAndGet(); |
| } else { |
| missesInCache.incrementAndGet(); |
| } |
| |
| byte[] testData = testData(random, blockSize, newData); |
| long t1 = System.nanoTime(); |
| blockCache.store(blockCacheKey, 0, testData, 0, blockSize); |
| storeTime += (System.nanoTime() - t1); |
| |
| long t3 = System.nanoTime(); |
| if (blockCache.fetch(blockCacheKey, buffer)) { |
| fetchTime += (System.nanoTime() - t3); |
| assertTrue(Arrays.equals(testData, buffer)); |
| } |
| } |
| System.out.println("Cache Hits = " + hitsInCache.get()); |
| System.out.println("Cache Misses = " + missesInCache.get()); |
| System.out.println("Store = " + (storeTime / (double) passes) / 1000000.0); |
| System.out.println("Fetch = " + (fetchTime / (double) passes) / 1000000.0); |
| System.out.println("# of Elements = " + blockCache.getSize()); |
| } |
| |
| /** |
| * Verify checking of buffer size limits against the cached block size. |
| */ |
| @Test |
| public void testLongBuffer() { |
| Random random = random(); |
| int blockSize = BlockCache._32K; |
| int slabSize = blockSize * 1024; |
| long totalMemory = 2 * slabSize; |
| |
| BlockCache blockCache = new BlockCache(new Metrics(new Configuration()), |
| true, totalMemory, slabSize); |
| BlockCacheKey blockCacheKey = new BlockCacheKey(); |
| blockCacheKey.setBlock(0); |
| blockCacheKey.setFile(0); |
| byte[] newData = new byte[blockSize*3]; |
| byte[] testData = testData(random, blockSize, newData); |
| |
| assertTrue(blockCache.store(blockCacheKey, 0, testData, 0, blockSize)); |
| assertTrue(blockCache.store(blockCacheKey, 0, testData, blockSize, blockSize)); |
| assertTrue(blockCache.store(blockCacheKey, 0, testData, blockSize*2, blockSize)); |
| |
| assertTrue(blockCache.store(blockCacheKey, 1, testData, 0, blockSize - 1)); |
| assertTrue(blockCache.store(blockCacheKey, 1, testData, blockSize, blockSize - 1)); |
| assertTrue(blockCache.store(blockCacheKey, 1, testData, blockSize*2, blockSize - 1)); |
| } |
| |
| private static byte[] testData(Random random, int size, byte[] buf) { |
| random.nextBytes(buf); |
| return buf; |
| } |
| } |