/** * Initilizes {@link DiskBalancer}. * @param data - FSDataSet * @param conf - Config */ private void initDiskBalancer(FsDatasetSpi data, Configuration conf) { if (this.diskBalancer != null) { return; } DiskBalancer.BlockMover mover = new DiskBalancer.DiskBalancerMover(data, conf); this.diskBalancer = new DiskBalancer(getDatanodeUuid(), conf, mover); }