== sanity test 413k: QoS mkdir exclude prefixes ========== 12:34:09 (1787848449)
lmv.lustre-clilmv-ffff98830adb6800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff98830adb6800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff98830adb6800.qos_exclude_prefixes=_temporary