== sanity test 413k: QoS mkdir exclude prefixes ========== 21:22:42 (1746148962)
lmv.lustre-clilmv-ffff880098ac8800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff880098ac8800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff880098ac8800.qos_exclude_prefixes=_temporary