Running "lctl get_param -R '*'" on a large filesystem can dump a LOT of duplicate data due to symlinks under lov.*.target_obds and lmv.*.target_obds pointing back to the respective osc.* and mdc.* trees.

It should be possible to avoid this duplication with e.g. "--nofollow" and re-enable it with "--follow" (depending on which is the default).