/**
* 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.hadoop.mapred.gridmix;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.mapreduce.InputFormat;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.TaskType;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.tools.rumen.JobStory;
import org.apache.hadoop.tools.rumen.TaskInfo;
import java.io.IOException;
import java.security.PrivilegedExceptionAction;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
/**
* Synthetic job generated from a trace description.
*/
class LoadJob extends GridmixJob {
public static final Log LOG = LogFactory.getLog(LoadJob.class);
public LoadJob(
final Configuration conf, long submissionMillis, final JobStory jobdesc,
Path outRoot, UserGroupInformation ugi, final int seq) throws IOException {
super(conf,submissionMillis,jobdesc,outRoot,ugi,seq);
}
public Job call() throws IOException, InterruptedException,
ClassNotFoundException {
ugi.doAs(
new PrivilegedExceptionAction<Job>() {
public Job run() throws IOException, ClassNotFoundException,
InterruptedException {
job.setMapperClass(LoadMapper.class);
job.setReducerClass(LoadReducer.class);
job.setNumReduceTasks(jobdesc.getNumberReduces());
job.setMapOutputKeyClass(GridmixKey.class);
job.setMapOutputValueClass(GridmixRecord.class);
job.setSortComparatorClass(GridmixKey.Comparator.class);
job.setGroupingComparatorClass(SpecGroupingComparator.class);
job.setInputFormatClass(LoadInputFormat.class);
job.setOutputFormatClass(RawBytesOutputFormat.class);
job.setPartitionerClass(DraftPartitioner.class);
job.setJarByClass(LoadJob.class);
job.getConfiguration().setBoolean(
"mapred.used.genericoptionsparser", true);
FileOutputFormat.setOutputPath(job, outdir);
job.submit();
return job;
}
});
return job;
}
public static class LoadMapper
extends Mapper<NullWritable,GridmixRecord,GridmixKey,GridmixRecord> {
private double acc;
private double ratio;
private final ArrayList<RecordFactory> reduces =
new ArrayList<RecordFactory>();
private final Random r = new Random();
private final GridmixKey key = new GridmixKey();
private final GridmixRecord val = new GridmixRecord();
@Override
protected void setup(Context ctxt)
throws IOException, InterruptedException {
final Configuration conf = ctxt.getConfiguration();
final LoadSplit split = (LoadSplit) ctxt.getInputSplit();
final int maps = split.getMapCount();
final long[] reduceBytes = split.getOutputBytes();
final long[] reduceRecords = split.getOutputRecords();
long totalRecords = 0L;
final int nReduces = ctxt.getNumReduceTasks();
if (nReduces > 0) {
int idx = 0;
int id = split.getId();
for (int i = 0; i < nReduces; ++i) {
final GridmixKey.Spec spec = new GridmixKey.Spec();
if (i == id) {
spec.bytes_out = split.getReduceBytes(idx);
spec.rec_out = split.getReduceRecords(idx);
++idx;
id += maps;
}
reduces.add(new IntermediateRecordFactory(
new AvgRecordFactory(reduceBytes[i], reduceRecords[i], conf),
i, reduceRecords[i], spec, conf));
totalRecords += reduceRecords[i];
}
} else {
reduces.add(new AvgRecordFactory(reduceBytes[0], reduceRecords[0],
conf));
totalRecords = reduceRecords[0];
}
final long splitRecords = split.getInputRecords();
final long inputRecords = splitRecords <= 0 && split.getLength() >= 0
? Math.max(1,
split.getLength() / conf.getInt("gridmix.missing.rec.size", 64*1024))
: splitRecords;
ratio = totalRecords / (1.0 * inputRecords);
acc = 0.0;
}
@Override
public void map(NullWritable ignored, GridmixRecord rec,
Context context) throws IOException, InterruptedException {
acc += ratio;
while (acc >= 1.0 && !reduces.isEmpty()) {
key.setSeed(r.nextLong());
val.setSeed(r.nextLong());
final int idx = r.nextInt(reduces.size());
final RecordFactory f = reduces.get(idx);
if (!f.next(key, val)) {
reduces.remove(idx);
continue;
}
context.write(key, val);
acc -= 1.0;
}
}
@Override
public void cleanup(Context context)
throws IOException, InterruptedException {
for (RecordFactory factory : reduces) {
key.setSeed(r.nextLong());
while (factory.next(key, val)) {
context.write(key, val);
key.setSeed(r.nextLong());
}
}
}
}
public static class LoadReducer
extends Reducer<GridmixKey,GridmixRecord,NullWritable,GridmixRecord> {
private final Random r = new Random();
private final GridmixRecord val = new GridmixRecord();
private double acc;
private double ratio;
private RecordFactory factory;
@Override
protected void setup(Context context)
throws IOException, InterruptedException {
if (!context.nextKey() ||
context.getCurrentKey().getType() != GridmixKey.REDUCE_SPEC) {
throw new IOException("Missing reduce spec");
}
long outBytes = 0L;
long outRecords = 0L;
long inRecords = 0L;
for (GridmixRecord ignored : context.getValues()) {
final GridmixKey spec = context.getCurrentKey();
inRecords += spec.getReduceInputRecords();
outBytes += spec.getReduceOutputBytes();
outRecords += spec.getReduceOutputRecords();
}
if (0 == outRecords && inRecords > 0) {
LOG.info("Spec output bytes w/o records. Using input record count");
outRecords = inRecords;
}
factory =
new AvgRecordFactory(outBytes, outRecords, context.getConfiguration());
ratio = outRecords / (1.0 * inRecords);
acc = 0.0;
}
@Override
protected void reduce(GridmixKey key, Iterable<GridmixRecord> values,
Context context) throws IOException, InterruptedException {
for (GridmixRecord ignored : values) {
acc += ratio;
while (acc >= 1.0 && factory.next(null, val)) {
context.write(NullWritable.get(), val);
acc -= 1.0;
}
}
}
@Override
protected void cleanup(Context context)
throws IOException, InterruptedException {
val.setSeed(r.nextLong());
while (factory.next(null, val)) {
context.write(NullWritable.get(), val);
val.setSeed(r.nextLong());
}
}
}
static class LoadRecordReader
extends RecordReader<NullWritable,GridmixRecord> {
private RecordFactory factory;
private final Random r = new Random();
private final GridmixRecord val = new GridmixRecord();
public LoadRecordReader() { }
@Override
public void initialize(InputSplit genericSplit, TaskAttemptContext ctxt)
throws IOException, InterruptedException {
final LoadSplit split = (LoadSplit)genericSplit;
final Configuration conf = ctxt.getConfiguration();
factory = new ReadRecordFactory(split.getLength(),
split.getInputRecords(), new FileQueue(split, conf), conf);
}
@Override
public boolean nextKeyValue() throws IOException {
val.setSeed(r.nextLong());
return factory.next(null, val);
}
@Override
public float getProgress() throws IOException {
return factory.getProgress();
}
@Override
public NullWritable getCurrentKey() {
return NullWritable.get();
}
@Override
public GridmixRecord getCurrentValue() {
return val;
}
@Override
public void close() throws IOException {
factory.close();
}
}
static class LoadInputFormat
extends InputFormat<NullWritable,GridmixRecord> {
@Override
public List<InputSplit> getSplits(JobContext jobCtxt) throws IOException {
return pullDescription(jobCtxt);
}
@Override
public RecordReader<NullWritable,GridmixRecord> createRecordReader(
InputSplit split, final TaskAttemptContext taskContext)
throws IOException {
return new LoadRecordReader();
}
}
@Override
void buildSplits(FilePool inputDir) throws IOException {
long mapInputBytesTotal = 0L;
long mapOutputBytesTotal = 0L;
long mapOutputRecordsTotal = 0L;
final JobStory jobdesc = getJobDesc();
if (null == jobdesc) {
return;
}
final int maps = jobdesc.getNumberMaps();
final int reds = jobdesc.getNumberReduces();
for (int i = 0; i < maps; ++i) {
final TaskInfo info = jobdesc.getTaskInfo(TaskType.MAP, i);
mapInputBytesTotal += info.getInputBytes();
mapOutputBytesTotal += info.getOutputBytes();
mapOutputRecordsTotal += info.getOutputRecords();
}
final double[] reduceRecordRatio = new double[reds];
final double[] reduceByteRatio = new double[reds];
for (int i = 0; i < reds; ++i) {
final TaskInfo info = jobdesc.getTaskInfo(TaskType.REDUCE, i);
reduceByteRatio[i] = info.getInputBytes() / (1.0 * mapOutputBytesTotal);
reduceRecordRatio[i] =
info.getInputRecords() / (1.0 * mapOutputRecordsTotal);
}
final InputStriper striper = new InputStriper(inputDir, mapInputBytesTotal);
final List<InputSplit> splits = new ArrayList<InputSplit>();
for (int i = 0; i < maps; ++i) {
final int nSpec = reds / maps + ((reds % maps) > i ? 1 : 0);
final long[] specBytes = new long[nSpec];
final long[] specRecords = new long[nSpec];
for (int j = 0; j < nSpec; ++j) {
final TaskInfo info =
jobdesc.getTaskInfo(TaskType.REDUCE, i + j * maps);
specBytes[j] = info.getOutputBytes();
specRecords[j] = info.getOutputRecords();
if (LOG.isDebugEnabled()) {
LOG.debug(String.format("SPEC(%d) %d -> %d %d %d", id(), i,
i + j * maps, info.getOutputRecords(), info.getOutputBytes()));
}
}
final TaskInfo info = jobdesc.getTaskInfo(TaskType.MAP, i);
splits.add(new LoadSplit(striper.splitFor(inputDir,
info.getInputBytes(), 3), maps, i,
info.getInputBytes(), info.getInputRecords(),
info.getOutputBytes(), info.getOutputRecords(),
reduceByteRatio, reduceRecordRatio, specBytes, specRecords));
}
pushDescription(id(), splits);
}
}