org.apache.druid.benchmark.FloatCompressionBenchmarkFileGenerator.java Source code

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Here is the source code for org.apache.druid.benchmark.FloatCompressionBenchmarkFileGenerator.java

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/*
 * 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.druid.benchmark;

import com.google.common.collect.ImmutableList;
import org.apache.druid.benchmark.datagen.BenchmarkColumnSchema;
import org.apache.druid.benchmark.datagen.BenchmarkColumnValueGenerator;
import org.apache.druid.java.util.common.logger.Logger;
import org.apache.druid.segment.column.ValueType;
import org.apache.druid.segment.data.ColumnarFloatsSerializer;
import org.apache.druid.segment.data.CompressionFactory;
import org.apache.druid.segment.data.CompressionStrategy;
import org.apache.druid.segment.writeout.OffHeapMemorySegmentWriteOutMedium;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.Writer;
import java.nio.ByteOrder;
import java.nio.channels.FileChannel;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class FloatCompressionBenchmarkFileGenerator {
    private static final Logger log = new Logger(FloatCompressionBenchmarkFileGenerator.class);
    public static final int ROW_NUM = 5000000;
    public static final List<CompressionStrategy> compressions = ImmutableList.of(CompressionStrategy.LZ4,
            CompressionStrategy.NONE);

    private static String dirPath = "floatCompress/";

    public static void main(String[] args) throws IOException {
        if (args.length >= 1) {
            dirPath = args[0];
        }

        BenchmarkColumnSchema enumeratedSchema = BenchmarkColumnSchema.makeEnumerated("", ValueType.FLOAT, true, 1,
                0d, ImmutableList.of(0f, 1.1f, 2.2f, 3.3f, 4.4f),
                ImmutableList.of(0.95, 0.001, 0.0189, 0.03, 0.0001));
        BenchmarkColumnSchema zipfLowSchema = BenchmarkColumnSchema.makeZipf("", ValueType.FLOAT, true, 1, 0d, -1,
                1000, 1d);
        BenchmarkColumnSchema zipfHighSchema = BenchmarkColumnSchema.makeZipf("", ValueType.FLOAT, true, 1, 0d, -1,
                1000, 3d);
        BenchmarkColumnSchema sequentialSchema = BenchmarkColumnSchema.makeSequential("", ValueType.FLOAT, true, 1,
                0d, 1470187671, 2000000000);
        BenchmarkColumnSchema uniformSchema = BenchmarkColumnSchema.makeContinuousUniform("", ValueType.FLOAT, true,
                1, 0d, 0, 1000);

        Map<String, BenchmarkColumnValueGenerator> generators = new HashMap<>();
        generators.put("enumerate", new BenchmarkColumnValueGenerator(enumeratedSchema, 1));
        generators.put("zipfLow", new BenchmarkColumnValueGenerator(zipfLowSchema, 1));
        generators.put("zipfHigh", new BenchmarkColumnValueGenerator(zipfHighSchema, 1));
        generators.put("sequential", new BenchmarkColumnValueGenerator(sequentialSchema, 1));
        generators.put("uniform", new BenchmarkColumnValueGenerator(uniformSchema, 1));

        File dir = new File(dirPath);
        dir.mkdir();

        // create data files using BenchmarkColunValueGenerator
        for (Map.Entry<String, BenchmarkColumnValueGenerator> entry : generators.entrySet()) {
            final File dataFile = new File(dir, entry.getKey());
            dataFile.delete();
            try (Writer writer = Files.newBufferedWriter(dataFile.toPath(), StandardCharsets.UTF_8)) {
                for (int i = 0; i < ROW_NUM; i++) {
                    writer.write((Float) entry.getValue().generateRowValue() + "\n");
                }
            }
        }

        // create compressed files using all combinations of CompressionStrategy and FloatEncoding provided
        for (Map.Entry<String, BenchmarkColumnValueGenerator> entry : generators.entrySet()) {
            for (CompressionStrategy compression : compressions) {
                String name = entry.getKey() + "-" + compression.toString();
                log.info("%s: ", name);
                File compFile = new File(dir, name);
                compFile.delete();
                File dataFile = new File(dir, entry.getKey());

                ColumnarFloatsSerializer writer = CompressionFactory.getFloatSerializer(
                        new OffHeapMemorySegmentWriteOutMedium(), "float", ByteOrder.nativeOrder(), compression);
                try (BufferedReader br = Files.newBufferedReader(dataFile.toPath(), StandardCharsets.UTF_8);
                        FileChannel output = FileChannel.open(compFile.toPath(), StandardOpenOption.CREATE_NEW,
                                StandardOpenOption.WRITE)) {
                    writer.open();
                    String line;
                    while ((line = br.readLine()) != null) {
                        writer.add(Float.parseFloat(line));
                    }
                    writer.writeTo(output, null);
                }
                log.info("%d", compFile.length() / 1024);
            }
        }
    }
}