== sanity test 413k: QoS mkdir exclude prefixes ========== 00:01:42 (1746158502)
lmv.lustre-clilmv-ffff8800b4060800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8800b4060800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8800b4060800.qos_exclude_prefixes=_temporary