== sanity test 413k: QoS mkdir exclude prefixes ========== 18:19:03 (1787609943)
lmv.lustre-clilmv-ffff9ad908787800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9ad908787800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9ad908787800.qos_exclude_prefixes=_temporary