private void createPageRankLinksDirectly() throws IOException, URISyntaxException {
log.info("Creating PageRank links", null);
JobConf job = new JobConf(PagerankData.class);
String jobname = "Create pagerank links";
Path fout = new Path(options.getResultPath(), EDGES_DIR_NAME);
job.setJobName(jobname);
setPageRankLinksOptions(job);
job.setOutputKeyClass(LongWritable.class);
job.setOutputValueClass(Text.class);
// job.setMapOutputKeyClass(LongWritable.class);
// job.setMapOutputValueClass(Text.class);
job.setNumReduceTasks(0);
FileInputFormat.setInputPaths(job, dummy.getPath());
job.setInputFormat(NLineInputFormat.class);
job.setMapperClass(DummyToPageRankLinksMapper.class);
if (options.isSequenceOut()) {
job.setOutputFormat(SequenceFileOutputFormat.class);
} else {
job.setOutputFormat(TextOutputFormat.class);
}
if (null != options.getCodecClass()) {
job.set("mapred.output.compression.type", "BLOCK");
job.set("mapreduce.output.fileoutputformat.compress.type", "BLOCK");
FileOutputFormat.setCompressOutput(job, true);
FileOutputFormat.setOutputCompressorClass(job, options.getCodecClass());
}
FileOutputFormat.setOutputPath(job, fout);
log.info("Running Job: " + jobname);
log.info("Dummy file " + dummy.getPath() + " as input");
log.info("Edges file " + fout + " as output");
JobClient.runJob(job);
log.info("Finished Running Job: " + jobname);
}
/**
* Test of {@link FileQueue} can identify compressed file and provide readers to extract
* uncompressed data only if input-compression is enabled.
*/
@Test
public void testFileQueueDecompression() throws IOException {
JobConf conf = new JobConf();
FileSystem lfs = FileSystem.getLocal(conf);
String inputLine = "Hi Hello!";
CompressionEmulationUtil.setCompressionEmulationEnabled(conf, true);
CompressionEmulationUtil.setInputCompressionEmulationEnabled(conf, true);
org.apache.hadoop.mapred.FileOutputFormat.setCompressOutput(conf, true);
org.apache.hadoop.mapred.FileOutputFormat.setOutputCompressorClass(conf, GzipCodec.class);
// define the test's root temp directory
Path rootTempDir =
new Path(System.getProperty("test.build.data", "/tmp"))
.makeQualified(lfs.getUri(), lfs.getWorkingDirectory());
Path tempDir = new Path(rootTempDir, "TestFileQueueDecompression");
lfs.delete(tempDir, true);
// create a compressed file
Path compressedFile = new Path(tempDir, "test");
OutputStream out =
CompressionEmulationUtil.getPossiblyCompressedOutputStream(compressedFile, conf);
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out));
writer.write(inputLine);
writer.close();
compressedFile = compressedFile.suffix(".gz");
// now read back the data from the compressed stream using FileQueue
long fileSize = lfs.listStatus(compressedFile)[0].getLen();
CombineFileSplit split =
new CombineFileSplit(new Path[] {compressedFile}, new long[] {fileSize});
FileQueue queue = new FileQueue(split, conf);
byte[] bytes = new byte[inputLine.getBytes().length];
queue.read(bytes);
queue.close();
String readLine = new String(bytes);
assertEquals("Compression/Decompression error", inputLine, readLine);
}
public static RecordWriter getHiveRecordWriter(
JobConf jc,
TableDesc tableInfo,
Class<? extends Writable> outputClass,
FileSinkDesc conf,
Path outPath)
throws HiveException {
try {
HiveOutputFormat<?, ?> hiveOutputFormat = tableInfo.getOutputFileFormatClass().newInstance();
boolean isCompressed = conf.getCompressed();
JobConf jc_output = jc;
if (isCompressed) {
jc_output = new JobConf(jc);
String codecStr = conf.getCompressCodec();
if (codecStr != null && !codecStr.trim().equals("")) {
Class<? extends CompressionCodec> codec =
(Class<? extends CompressionCodec>) Class.forName(codecStr);
FileOutputFormat.setOutputCompressorClass(jc_output, codec);
}
String type = conf.getCompressType();
if (type != null && !type.trim().equals("")) {
CompressionType style = CompressionType.valueOf(type);
SequenceFileOutputFormat.setOutputCompressionType(jc, style);
}
}
return getRecordWriter(
jc_output,
hiveOutputFormat,
outputClass,
isCompressed,
tableInfo.getProperties(),
outPath);
} catch (Exception e) {
throw new HiveException(e);
}
}
private void createPageRankNodesDirectly() throws IOException {
log.info("Creating PageRank nodes...", null);
Path fout = new Path(options.getResultPath(), VERTICALS_DIR_NAME);
JobConf job = new JobConf(PagerankData.class);
String jobname = "Create pagerank nodes";
job.setJobName(jobname);
setPageRankNodesOptions(job);
job.setOutputKeyClass(LongWritable.class);
job.setOutputValueClass(Text.class);
FileInputFormat.setInputPaths(job, dummy.getPath());
job.setInputFormat(NLineInputFormat.class);
if (balance) {
/**
* * Balance the output order of nodes, to prevent the running of pagerank bench from
* potential data skew
*/
job.setMapOutputKeyClass(LongWritable.class);
job.setMapOutputValueClass(NullWritable.class);
job.setMapperClass(BalancedLinkNodesMapper.class);
job.setReducerClass(BalancedLinkNodesReducer.class);
// job.setPartitionerClass(ModulusPartitioner.class);
if (options.getNumReds() > 0) {
job.setNumReduceTasks(options.getNumReds());
} else {
job.setNumReduceTasks(Utils.getMaxNumReds());
}
} else {
job.setMapOutputKeyClass(Text.class);
job.setMapperClass(DummyToNodesMapper.class);
job.setNumReduceTasks(0);
}
if (options.isSequenceOut()) {
job.setOutputFormat(SequenceFileOutputFormat.class);
} else {
job.setOutputFormat(TextOutputFormat.class);
}
if (null != options.getCodecClass()) {
job.set("mapred.output.compression.type", "BLOCK");
job.set("mapreduce.output.fileoutputformat.compress.type", "BLOCK");
FileOutputFormat.setCompressOutput(job, true);
FileOutputFormat.setOutputCompressorClass(job, options.getCodecClass());
}
FileOutputFormat.setOutputPath(job, fout);
log.info("Running Job: " + jobname);
log.info("Dummy file " + dummy.getPath() + " as input");
log.info("Vertices file " + fout + " as output");
JobClient.runJob(job);
log.info("Finished Running Job: " + jobname);
}
