== sanity test 413k: QoS mkdir exclude prefixes ========== 20:03:05 (1781222585)
lmv.lustre-clilmv-ffff953e8365f800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff953e8365f800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff953e8365f800.qos_exclude_prefixes=_temporary