== sanity test 413k: QoS mkdir exclude prefixes ========== 12:07:22 (1783354042)
lmv.lustre-clilmv-ffff966fd154f800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff966fd154f800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff966fd154f800.qos_exclude_prefixes=_temporary