| /* |
| * 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. |
| */ |
| |
| package org.apache.cassandra.io.util; |
| |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| public class DiskOptimizationStrategyTest |
| { |
| @Test |
| public void testRoundingBufferSize() |
| { |
| DiskOptimizationStrategy strategy = new SsdDiskOptimizationStrategy(0.95); |
| assertEquals(4096, strategy.roundBufferSize(-1L)); |
| assertEquals(4096, strategy.roundBufferSize(0)); |
| assertEquals(4096, strategy.roundBufferSize(1)); |
| assertEquals(4096, strategy.roundBufferSize(2013)); |
| assertEquals(4096, strategy.roundBufferSize(4095)); |
| assertEquals(4096, strategy.roundBufferSize(4096)); |
| assertEquals(8192, strategy.roundBufferSize(4097)); |
| assertEquals(8192, strategy.roundBufferSize(8191)); |
| assertEquals(8192, strategy.roundBufferSize(8192)); |
| assertEquals(12288, strategy.roundBufferSize(8193)); |
| assertEquals(65536, strategy.roundBufferSize(65535)); |
| assertEquals(65536, strategy.roundBufferSize(65536)); |
| assertEquals(65536, strategy.roundBufferSize(65537)); |
| assertEquals(65536, strategy.roundBufferSize(10000000000000000L)); |
| } |
| |
| @Test |
| public void testBufferSize_ssd() |
| { |
| DiskOptimizationStrategy strategy = new SsdDiskOptimizationStrategy(0.1); |
| |
| assertEquals(4096, strategy.bufferSize(0)); |
| assertEquals(4096, strategy.bufferSize(10)); |
| assertEquals(4096, strategy.bufferSize(100)); |
| assertEquals(4096, strategy.bufferSize(4096)); |
| assertEquals(8192, strategy.bufferSize(4505)); // just < (4096 + 4096 * 0.1) |
| assertEquals(12288, strategy.bufferSize(4506)); // just > (4096 + 4096 * 0.1) |
| |
| strategy = new SsdDiskOptimizationStrategy(0.5); |
| assertEquals(8192, strategy.bufferSize(4506)); // just > (4096 + 4096 * 0.1) |
| assertEquals(8192, strategy.bufferSize(6143)); // < (4096 + 4096 * 0.5) |
| assertEquals(12288, strategy.bufferSize(6144)); // = (4096 + 4096 * 0.5) |
| assertEquals(12288, strategy.bufferSize(6145)); // > (4096 + 4096 * 0.5) |
| |
| strategy = new SsdDiskOptimizationStrategy(1.0); // never add a page |
| assertEquals(8192, strategy.bufferSize(8191)); |
| assertEquals(8192, strategy.bufferSize(8192)); |
| |
| strategy = new SsdDiskOptimizationStrategy(0.0); // always add a page |
| assertEquals(8192, strategy.bufferSize(10)); |
| assertEquals(8192, strategy.bufferSize(4096)); |
| } |
| |
| @Test |
| public void testBufferSize_spinning() |
| { |
| DiskOptimizationStrategy strategy = new SpinningDiskOptimizationStrategy(); |
| |
| assertEquals(4096, strategy.bufferSize(0)); |
| assertEquals(8192, strategy.bufferSize(10)); |
| assertEquals(8192, strategy.bufferSize(100)); |
| assertEquals(8192, strategy.bufferSize(4096)); |
| assertEquals(12288, strategy.bufferSize(4097)); |
| } |
| |
| @Test |
| public void testRoundUpForCaching() |
| { |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(-1, true)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(0, true)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(1, true)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(4095, true)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(4096, true)); |
| assertEquals(8192, DiskOptimizationStrategy.roundForCaching(4097, true)); |
| assertEquals(8192, DiskOptimizationStrategy.roundForCaching(4098, true)); |
| assertEquals(8192, DiskOptimizationStrategy.roundForCaching(8192, true)); |
| assertEquals(16384, DiskOptimizationStrategy.roundForCaching(8193, true)); |
| assertEquals(16384, DiskOptimizationStrategy.roundForCaching(12288, true)); |
| assertEquals(16384, DiskOptimizationStrategy.roundForCaching(16384, true)); |
| assertEquals(65536, DiskOptimizationStrategy.roundForCaching(65536, true)); |
| assertEquals(65536, DiskOptimizationStrategy.roundForCaching(65537, true)); |
| assertEquals(65536, DiskOptimizationStrategy.roundForCaching(131072, true)); |
| |
| for (int cs = 4096; cs < 65536; cs <<= 1) // 4096, 8192, 12288, ..., 65536 |
| { |
| for (int i = (cs - 4095); i <= cs; i++) // 1 -> 4096, 4097 -> 8192, ... |
| { |
| assertEquals(cs, DiskOptimizationStrategy.roundForCaching(i, true)); |
| } |
| } |
| } |
| |
| @Test |
| public void testRoundDownForCaching() |
| { |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(-1, false)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(0, false)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(1, false)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(4095, false)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(4096, false)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(4097, false)); |
| assertEquals(4096, DiskOptimizationStrategy.roundForCaching(4098, false)); |
| assertEquals(8192, DiskOptimizationStrategy.roundForCaching(8192, false)); |
| assertEquals(8192, DiskOptimizationStrategy.roundForCaching(8193, false)); |
| assertEquals(8192, DiskOptimizationStrategy.roundForCaching(12288, false)); |
| assertEquals(16384, DiskOptimizationStrategy.roundForCaching(16384, false)); |
| assertEquals(65536, DiskOptimizationStrategy.roundForCaching(65536, false)); |
| assertEquals(65536, DiskOptimizationStrategy.roundForCaching(65537, false)); |
| assertEquals(65536, DiskOptimizationStrategy.roundForCaching(131072, false)); |
| |
| for (int cs = 4096; cs < 65536; cs <<= 1) // 4096, 8192, 12288, ..., 65536 |
| { |
| for (int i = cs; i < cs * 2 - 1; i++) // 4096 -> 8191, 8192 -> 12287, ... |
| { |
| assertEquals(cs, DiskOptimizationStrategy.roundForCaching(i, false)); |
| } |
| } |
| } |
| } |