== sanity test 413k: QoS mkdir exclude prefixes ========== 16:26:03 (1788294363)
lmv.lustre-clilmv-ffff937060877800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff937060877800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff937060877800.qos_exclude_prefixes=_temporary