== sanity test 413k: QoS mkdir exclude prefixes ========== 18:31:01 (1787869861)
lmv.lustre-clilmv-ffff9868525f8000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9868525f8000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9868525f8000.qos_exclude_prefixes=_temporary