== sanity test 413k: QoS mkdir exclude prefixes ========== 07:46:47 (1749124007)
lmv.lustre-clilmv-ffff88012da0b800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff88012da0b800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff88012da0b800.qos_exclude_prefixes=_temporary