sourceConf.setLong(MRConfig.MAPMEMORY_MB, clusterMapMB);
sourceConf.setLong(MRJobConfig.REDUCE_MEMORY_MB, jobReduceMB);
sourceConf.setLong(MRConfig.REDUCEMEMORY_MB, clusterReduceMB);
// define a mock job
MockJob story = new MockJob(sourceConf);
GridmixJob job = new DummyGridmixJob(simulatedJobConf, story);
Job simulatedJob = job.getJob();
Configuration simulatedConf = simulatedJob.getConfiguration();