== sanity test 413k: QoS mkdir exclude prefixes ========== 07:54:29 (1788695669)
lmv.lustre-clilmv-ffff90c543d63000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff90c543d63000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff90c543d63000.qos_exclude_prefixes=_temporary