== sanity test 413k: QoS mkdir exclude prefixes ========== 11:46:03 (1774885563)
lmv.lustre-clilmv-ffff8907edb41800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8907edb41800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8907edb41800.qos_exclude_prefixes=_temporary