List of usage examples for org.apache.hadoop.mapreduce MRJobConfig NUM_MAP_PROFILES
String NUM_MAP_PROFILES
To view the source code for org.apache.hadoop.mapreduce MRJobConfig NUM_MAP_PROFILES.
Click Source Link
From source file:com.cloudera.ByteCount.java
License:Apache License
public static void main(String[] args) throws Exception { JobConf conf = new JobConf(new Configuration()); // Trim off the hadoop-specific args String[] remArgs = new GenericOptionsParser(conf, args).getRemainingArgs(); // Pull in properties Options options = new Options(); Option property = OptionBuilder.withArgName("property=value").hasArgs(2).withValueSeparator() .withDescription("use value for given property").create("D"); options.addOption(property);// w ww . ja va 2 s . c om Option skipChecksums = new Option("skipChecksums", "skip checksums"); options.addOption(skipChecksums); Option profile = new Option("profile", "profile tasks"); options.addOption(profile); CommandLineParser parser = new BasicParser(); CommandLine line = parser.parse(options, remArgs); Properties properties = line.getOptionProperties("D"); for (Entry<Object, Object> prop : properties.entrySet()) { conf.set(prop.getKey().toString(), prop.getValue().toString()); System.out.println("Set config key " + prop.getKey() + " to " + prop.getValue()); } if (line.hasOption("skipChecksums")) { conf.setBoolean("bytecount.skipChecksums", true); System.out.println("Skipping checksums"); } if (line.hasOption("profile")) { conf.setBoolean("mapred.task.profile", true); conf.set("mapred.task.profile.params", "-agentlib:hprof=cpu=samples,depth=100,interval=1ms,lineno=y,thread=y,file=%s"); conf.set(MRJobConfig.NUM_MAP_PROFILES, "0"); conf.set("mapred.task.profile.maps", "1"); System.out.println("Profiling map tasks"); } // Get the positional arguments out remArgs = line.getArgs(); if (remArgs.length != 2) { System.err.println("Usage: ByteCount <inputBase> <outputBase>"); System.exit(1); } String inputBase = remArgs[0]; String outputBase = remArgs[1]; Job job = Job.getInstance(conf); job.setInputFormatClass(ByteBufferInputFormat.class); job.setMapOutputKeyClass(ByteWritable.class); job.setMapOutputValueClass(LongWritable.class); job.setMapperClass(ByteCountMapper.class); job.setReducerClass(ByteCountReducer.class); job.setCombinerClass(ByteCountReducer.class); job.setOutputKeyClass(ByteWritable.class); job.setOutputValueClass(LongWritable.class); FileInputFormat.addInputPath(job, new Path(inputBase)); FileOutputFormat.setOutputPath(job, new Path(outputBase)); job.setJarByClass(ByteCount.class); boolean success = job.waitForCompletion(true); Counters counters = job.getCounters(); System.out.println("\tRead counters"); printCounter(counters, READ_COUNTER.BYTES_READ); printCounter(counters, READ_COUNTER.LOCAL_BYTES_READ); printCounter(counters, READ_COUNTER.SCR_BYTES_READ); printCounter(counters, READ_COUNTER.ZCR_BYTES_READ); System.exit(success ? 0 : 1); }