== sanity test 413k: QoS mkdir exclude prefixes ========== 11:29:31 (1790782171)
lmv.lustre-clilmv-ffff96d09815a800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff96d09815a800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff96d09815a800.qos_exclude_prefixes=_temporary