| /* |
| * 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 org.apache.cassandra.config.Config; |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| public class SegmentedFileTest |
| { |
| @Test |
| public void testRoundingBufferSize() |
| { |
| assertEquals(4096, SegmentedFile.Builder.roundBufferSize(-1L)); |
| assertEquals(4096, SegmentedFile.Builder.roundBufferSize(0)); |
| assertEquals(4096, SegmentedFile.Builder.roundBufferSize(1)); |
| assertEquals(4096, SegmentedFile.Builder.roundBufferSize(2013)); |
| assertEquals(4096, SegmentedFile.Builder.roundBufferSize(4095)); |
| assertEquals(4096, SegmentedFile.Builder.roundBufferSize(4096)); |
| assertEquals(8192, SegmentedFile.Builder.roundBufferSize(4097)); |
| assertEquals(8192, SegmentedFile.Builder.roundBufferSize(8191)); |
| assertEquals(8192, SegmentedFile.Builder.roundBufferSize(8192)); |
| assertEquals(12288, SegmentedFile.Builder.roundBufferSize(8193)); |
| assertEquals(65536, SegmentedFile.Builder.roundBufferSize(65535)); |
| assertEquals(65536, SegmentedFile.Builder.roundBufferSize(65536)); |
| assertEquals(65536, SegmentedFile.Builder.roundBufferSize(65537)); |
| assertEquals(65536, SegmentedFile.Builder.roundBufferSize(10000000000000000L)); |
| } |
| |
| @Test |
| public void testBufferSize_ssd() |
| { |
| DatabaseDescriptor.setDiskOptimizationStrategy(Config.DiskOptimizationStrategy.ssd); |
| DatabaseDescriptor.setDiskOptimizationPageCrossChance(0.1); |
| |
| assertEquals(4096, SegmentedFile.Builder.bufferSize(0)); |
| assertEquals(4096, SegmentedFile.Builder.bufferSize(10)); |
| assertEquals(4096, SegmentedFile.Builder.bufferSize(100)); |
| assertEquals(4096, SegmentedFile.Builder.bufferSize(4096)); |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(4505)); // just < (4096 + 4096 * 0.1) |
| assertEquals(12288, SegmentedFile.Builder.bufferSize(4506)); // just > (4096 + 4096 * 0.1) |
| |
| DatabaseDescriptor.setDiskOptimizationPageCrossChance(0.5); |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(4506)); // just > (4096 + 4096 * 0.1) |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(6143)); // < (4096 + 4096 * 0.5) |
| assertEquals(12288, SegmentedFile.Builder.bufferSize(6144)); // = (4096 + 4096 * 0.5) |
| assertEquals(12288, SegmentedFile.Builder.bufferSize(6145)); // > (4096 + 4096 * 0.5) |
| |
| DatabaseDescriptor.setDiskOptimizationPageCrossChance(1.0); // never add a page |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(8191)); |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(8192)); |
| |
| DatabaseDescriptor.setDiskOptimizationPageCrossChance(0.0); // always add a page |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(10)); |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(4096)); |
| } |
| |
| @Test |
| public void testBufferSize_spinning() |
| { |
| DatabaseDescriptor.setDiskOptimizationStrategy(Config.DiskOptimizationStrategy.spinning); |
| |
| assertEquals(4096, SegmentedFile.Builder.bufferSize(0)); |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(10)); |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(100)); |
| assertEquals(8192, SegmentedFile.Builder.bufferSize(4096)); |
| assertEquals(12288, SegmentedFile.Builder.bufferSize(4097)); |
| } |
| } |