| /* |
| * 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.sysds.runtime.io; |
| |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.LocalFileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.wink.json4j.JSONException; |
| import org.apache.sysds.common.Types.FileFormat; |
| import org.apache.sysds.conf.DMLConfig; |
| import org.apache.sysds.hops.OptimizerUtils; |
| import org.apache.sysds.runtime.controlprogram.parfor.stat.InfrastructureAnalyzer; |
| import org.apache.sysds.runtime.matrix.data.FrameBlock; |
| import org.apache.sysds.runtime.util.CommonThreadPool; |
| import org.apache.sysds.runtime.util.HDFSTool; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Future; |
| |
| public class FrameWriterJSONLParallel extends FrameWriterJSONL { |
| @Override |
| protected void writeJSONLFrameToHDFS(Path path, JobConf jobConf, FrameBlock src, |
| long rlen, long clen, Map<String, Integer> schemaMap) throws IOException, JSONException |
| { |
| //estimate output size and number of output blocks (min 1) |
| int numPartFiles = Math.max((int)(OptimizerUtils.estimateSizeTextOutput(rlen, clen, rlen*clen, |
| FileFormat.JSONL) / InfrastructureAnalyzer.getHDFSBlockSize()), 1); |
| |
| //determine degree of parallelism |
| int numThreads = OptimizerUtils.getParallelTextWriteParallelism(); |
| numThreads = Math.min(numThreads, numPartFiles); |
| |
| //fall back to sequential write if dop is 1 (e.g., <128MB) in order to create single file |
| if( numThreads <= 1 ) { |
| super.writeJSONLFrameToHDFS(path, jobConf, src, rlen, clen, schemaMap); |
| return; |
| } |
| |
| //create directory for concurrent tasks |
| HDFSTool.createDirIfNotExistOnHDFS(path, DMLConfig.DEFAULT_SHARED_DIR_PERMISSION); |
| FileSystem fileSystem = IOUtilFunctions.getFileSystem(path, jobConf); |
| |
| //create and execute tasks |
| try |
| { |
| ExecutorService pool = CommonThreadPool.get(numThreads); |
| ArrayList<WriteFileTask> tasks = new ArrayList<>(); |
| int blklen = (int)Math.ceil((double)rlen / numThreads); |
| for(int i=0; i<numThreads & i*blklen<rlen; i++) { |
| Path newPath = new Path(path, IOUtilFunctions.getPartFileName(i)); |
| tasks.add(new WriteFileTask(newPath, fileSystem, src, i*blklen, (int)Math.min((i+1)*blklen, rlen), schemaMap)); |
| } |
| |
| //wait until all tasks have been executed |
| List<Future<Object>> rt = pool.invokeAll(tasks); |
| pool.shutdown(); |
| |
| //check for exceptions |
| for( Future<Object> task : rt ) |
| task.get(); |
| |
| // delete crc files if written to local file system |
| if (fileSystem instanceof LocalFileSystem) { |
| for(int i=0; i<numThreads & i*blklen<rlen; i++) |
| IOUtilFunctions.deleteCrcFilesFromLocalFileSystem(fileSystem, |
| new Path(path, IOUtilFunctions.getPartFileName(i))); |
| } |
| } |
| catch (Exception e) { |
| throw new IOException("Failed parallel write of JSONL output.", e); |
| } |
| } |
| |
| private class WriteFileTask implements Callable<Object> { |
| private Path _path; |
| private FileSystem _fileSystem; |
| private FrameBlock _src; |
| private int _lowerRowBound; |
| private int _upperRowBound; |
| Map<String, Integer> _schemaMap; |
| |
| public WriteFileTask(Path path, FileSystem fileSystem, FrameBlock src, |
| int lowerRowBound, int upperRowBound, Map<String, Integer> schemaMap) { |
| _path = path; |
| _fileSystem = fileSystem; |
| _src = src; |
| _lowerRowBound = lowerRowBound; |
| _upperRowBound = upperRowBound; |
| _schemaMap = schemaMap; |
| } |
| |
| @Override |
| public Object call() throws Exception { |
| writeJSONLFrameToFile(_path, _fileSystem, _src, _lowerRowBound, _upperRowBound, _schemaMap ); |
| return null; |
| } |
| } |
| } |