== sanity test 413k: QoS mkdir exclude prefixes ========== 05:26:03 (1788600363)
lmv.lustre-clilmv-ffff9879831e9000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9879831e9000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9879831e9000.qos_exclude_prefixes=_temporary