== sanity test 413k: QoS mkdir exclude prefixes ========== 06:25:10 (1768130710)
lmv.lustre-clilmv-ffff9aac43f35800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9aac43f35800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9aac43f35800.qos_exclude_prefixes=_temporary