| /* |
| * 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.kylin.engine.spark; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat; |
| import org.apache.kylin.common.KylinConfig; |
| import org.apache.kylin.common.util.Bytes; |
| import org.apache.kylin.common.util.HadoopUtil; |
| import org.apache.kylin.common.util.StringUtil; |
| import org.apache.kylin.cube.CubeSegment; |
| import org.apache.kylin.engine.EngineFactory; |
| import org.apache.kylin.engine.mr.IMROutput2; |
| import org.apache.kylin.engine.mr.common.BatchConstants; |
| import org.apache.kylin.engine.mr.common.CubeStatsReader; |
| import org.apache.kylin.metadata.model.IJoinedFlatTableDesc; |
| import org.apache.kylin.source.SourceManager; |
| import org.apache.kylin.storage.StorageFactory; |
| import org.apache.spark.SparkContext; |
| import org.apache.spark.api.java.JavaPairRDD; |
| import org.apache.spark.api.java.JavaRDD; |
| import org.apache.spark.api.java.JavaSparkContext; |
| import org.apache.kylin.engine.spark.ISparkInput.ISparkBatchCubingInputSide; |
| import org.apache.kylin.engine.spark.ISparkInput.ISparkBatchMergeInputSide; |
| |
| import com.google.common.collect.Lists; |
| import org.apache.spark.api.java.function.Function; |
| import org.apache.spark.sql.Dataset; |
| import org.apache.spark.sql.Row; |
| import org.apache.spark.sql.SparkSession; |
| import org.apache.spark.sql.hive.HiveUtils; |
| |
| public class SparkUtil { |
| |
| public static ISparkBatchCubingInputSide getBatchCubingInputSide(CubeSegment seg) { |
| IJoinedFlatTableDesc flatDesc = EngineFactory.getJoinedFlatTableDesc(seg); |
| return (ISparkBatchCubingInputSide)SourceManager.createEngineAdapter(seg, ISparkInput.class).getBatchCubingInputSide(flatDesc); |
| } |
| |
| public static ISparkOutput.ISparkBatchCubingOutputSide getBatchCubingOutputSide(CubeSegment seg) { |
| return StorageFactory.createEngineAdapter(seg, ISparkOutput.class).getBatchCubingOutputSide(seg); |
| } |
| |
| public static ISparkOutput.ISparkBatchMergeOutputSide getBatchMergeOutputSide2(CubeSegment seg) { |
| return StorageFactory.createEngineAdapter(seg, ISparkOutput.class).getBatchMergeOutputSide(seg); |
| } |
| |
| public static ISparkBatchMergeInputSide getBatchMergeInputSide(CubeSegment seg) { |
| return (ISparkBatchMergeInputSide)SourceManager.createEngineAdapter(seg, ISparkInput.class).getBatchMergeInputSide(seg); |
| } |
| |
| public static IMROutput2.IMRBatchOptimizeOutputSide2 getBatchOptimizeOutputSide2(CubeSegment seg) { |
| return StorageFactory.createEngineAdapter(seg, IMROutput2.class).getBatchOptimizeOutputSide(seg); |
| } |
| |
| /** |
| * Read the given path as a Java RDD; The path can have second level sub folder. |
| * @param inputPath |
| * @param fs |
| * @param sc |
| * @param keyClass |
| * @param valueClass |
| * @return |
| * @throws IOException |
| */ |
| public static JavaPairRDD parseInputPath(String inputPath, FileSystem fs, JavaSparkContext sc, Class keyClass, |
| Class valueClass) throws IOException { |
| List<String> inputFolders = Lists.newArrayList(); |
| Path inputHDFSPath = new Path(inputPath); |
| FileStatus[] fileStatuses = fs.listStatus(inputHDFSPath); |
| boolean hasDir = false; |
| for (FileStatus stat : fileStatuses) { |
| if (stat.isDirectory() && !stat.getPath().getName().startsWith("_")) { |
| hasDir = true; |
| inputFolders.add(stat.getPath().toString()); |
| } |
| } |
| |
| if (!hasDir) { |
| return sc.sequenceFile(inputHDFSPath.toString(), keyClass, valueClass); |
| } |
| |
| return sc.sequenceFile(StringUtil.join(inputFolders, ","), keyClass, valueClass); |
| } |
| |
| |
| public static int estimateLayerPartitionNum(int level, CubeStatsReader statsReader, KylinConfig kylinConfig) { |
| double baseCuboidSize = statsReader.estimateLayerSize(level); |
| float rddCut = kylinConfig.getSparkRDDPartitionCutMB(); |
| int partition = (int) (baseCuboidSize / rddCut); |
| partition = Math.max(kylinConfig.getSparkMinPartition(), partition); |
| partition = Math.min(kylinConfig.getSparkMaxPartition(), partition); |
| return partition; |
| } |
| |
| |
| public static int estimateTotalPartitionNum(CubeStatsReader statsReader, KylinConfig kylinConfig) { |
| double totalSize = 0; |
| for (double x: statsReader.getCuboidSizeMap().values()) { |
| totalSize += x; |
| } |
| float rddCut = kylinConfig.getSparkRDDPartitionCutMB(); |
| int partition = (int) (totalSize / rddCut); |
| partition = Math.max(kylinConfig.getSparkMinPartition(), partition); |
| partition = Math.min(kylinConfig.getSparkMaxPartition(), partition); |
| return partition; |
| } |
| |
| |
| public static void setHadoopConfForCuboid(Job job, CubeSegment segment, String metaUrl) throws Exception { |
| job.setOutputKeyClass(Text.class); |
| job.setOutputValueClass(Text.class); |
| job.setOutputFormatClass(SequenceFileOutputFormat.class); |
| } |
| |
| public static void modifySparkHadoopConfiguration(SparkContext sc, KylinConfig kylinConfig) throws Exception { |
| sc.hadoopConfiguration().set("dfs.replication", kylinConfig.getCuboidDfsReplication()); // cuboid intermediate files |
| sc.hadoopConfiguration().set("mapreduce.output.fileoutputformat.compress", "true"); |
| sc.hadoopConfiguration().set("mapreduce.output.fileoutputformat.compress.type", "BLOCK"); |
| sc.hadoopConfiguration().set("mapreduce.output.fileoutputformat.compress.codec", "org.apache.hadoop.io.compress.DefaultCodec"); // or org.apache.hadoop.io.compress.SnappyCodec |
| } |
| |
| public static JavaRDD<String[]> hiveRecordInputRDD(boolean isSequenceFile, JavaSparkContext sc, String inputPath, String hiveTable) throws IOException { |
| JavaRDD<String[]> recordRDD; |
| |
| if (isSequenceFile && HadoopUtil.isSequenceDir(sc.hadoopConfiguration(), new Path(inputPath))) { |
| recordRDD = getSequenceFormatHiveInput(sc, inputPath); |
| } else { |
| recordRDD = getOtherFormatHiveInput(sc, hiveTable); |
| } |
| |
| return recordRDD; |
| } |
| |
| private static JavaRDD<String[]> getSequenceFormatHiveInput(JavaSparkContext sc, String inputPath) { |
| return sc.sequenceFile(inputPath, BytesWritable.class, Text.class).values() |
| .map(new Function<Text, String[]>() { |
| @Override |
| public String[] call(Text text) throws Exception { |
| String s = Bytes.toString(text.getBytes(), 0, text.getLength()); |
| return s.split(BatchConstants.SEQUENCE_FILE_DEFAULT_DELIMITER, -1); |
| } |
| }); |
| } |
| |
| private static JavaRDD<String[]> getOtherFormatHiveInput(JavaSparkContext sc, String hiveTable) { |
| SparkSession sparkSession = SparkSession.builder().sparkContext(HiveUtils.withHiveExternalCatalog(sc.sc())) |
| .config(sc.getConf()).enableHiveSupport().getOrCreate(); |
| final Dataset intermediateTable = sparkSession.table(hiveTable); |
| return intermediateTable.javaRDD().map(new Function<Row, String[]>() { |
| @Override |
| public String[] call(Row row) throws Exception { |
| String[] result = new String[row.size()]; |
| for (int i = 0; i < row.size(); i++) { |
| final Object o = row.get(i); |
| if (o != null) { |
| result[i] = o.toString(); |
| } else { |
| result[i] = null; |
| } |
| } |
| return result; |
| } |
| }); |
| } |
| |
| } |