for (int level = maxLevel - 1; level >= 0; level --) {
String[] dirPaths = WorkerConf.get().STORAGE_TIER_DIRS[level].split(",");
for (int i = 0; i < dirPaths.length; i ++) {
dirPaths[i] = dirPaths[i].trim();
}
StorageLevelAlias Alias = WorkerConf.get().STORAGE_LEVEL_ALIAS[level];
String[] strDirCapacities = WorkerConf.get().STORAGE_TIER_DIR_QUOTA[level].split(",");
long[] dirCapacities = new long[dirPaths.length];
for (int i = 0, j = 0; i < dirPaths.length; i ++) {
// The storage directory quota for each storage directory
dirCapacities[i] = CommonUtils.parseSpaceSize(strDirCapacities[j].trim());