conf2.setLong(TTConfig.TT_LOCAL_CACHE_SUBDIRS_LIMIT, LOCAL_CACHE_SUBDIR);
conf2.setLong(TTConfig.TT_DISTRIBUTED_CACHE_CHECK_PERIOD, 200); // 200 ms
refreshConf(conf2);
TrackerDistributedCacheManager manager =
new TrackerDistributedCacheManager(conf2, taskController);
manager.startCleanupThread();
FileSystem localfs = FileSystem.getLocal(conf2);
String userName = getJobOwnerName();
conf2.set(MRJobConfig.USER_NAME, userName);
// We first test the size limit