== sanity test 413k: QoS mkdir exclude prefixes ========== 12:02:04 (1787587324)
lmv.lustre-clilmv-ffff941af9316000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff941af9316000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff941af9316000.qos_exclude_prefixes=_temporary