GiraphJob job = new GiraphJob(getConf(), getClass().getName());
int workers = Integer.parseInt(BenchmarkOption.WORKERS.getOptionValue(cmd));
GiraphConfiguration giraphConf = job.getConfiguration();
giraphConf.addWorkerObserverClass(LogVersions.class);
giraphConf.addMasterObserverClass(LogVersions.class);
giraphConf.setWorkerConfiguration(workers, workers, 100.0f);
prepareConfiguration(giraphConf, cmd);