== sanity test 413k: QoS mkdir exclude prefixes ========== 01:53:38 (1788846818)
lmv.lustre-clilmv-ffff9c33037db000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9c33037db000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9c33037db000.qos_exclude_prefixes=_temporary