== sanity test 413k: QoS mkdir exclude prefixes ========== 21:07:16 (1787792836)
lmv.lustre-clilmv-ffff8e60914d7800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8e60914d7800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8e60914d7800.qos_exclude_prefixes=_temporary