JobConf job = new JobConf(conf, ComputeSignaturesMinhash.class);
// job.set("mapred.job.tracker", "local");
// job.set("fs.default.name", "file:///");
FileSystem fs = FileSystem.get(job);
RetrievalEnvironment env = new RetrievalEnvironment(dir, fs);
int vocabSize = (int) env.readCollectionTermCount();
job.setJobName("ComputeSignatures_minhash");//+"_D="+D+"_"+RetrievalEnvironment.readCollectionName(fs, dir));
String inputPath = PwsimEnvironment.getFileNameWithPars(dir, "IntDocs");
String outputPath = PwsimEnvironment.getFileNameWithPars(dir, "SignaturesMinhash");