local_utilization(volname=None)Collect Utilization details of local bricks
:param volname: Volume Name :returns: List of utilization information { "volume": VOLUME_NAME, "brick_index": BRICK_INDEX_IN_VOL_INFO, "node_id": NODE_ID, "brick": BRICK_NAME, "block_size": ST_F_FRSIZE, "blocks_total": ST_F_BLOCKS, "blocks_free": ST_F_BFREE, "blocks_avail": ST_F_BAVAIL, "inodes_total": ST_F_FILES, "inodes_free": ST_F_FFREE, "inodes_avail": ST_F_FAVAIL }