== sanity test 413k: QoS mkdir exclude prefixes ========== 06:22:04 (1769080924)
lmv.lustre-clilmv-ffff8c038997e800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8c038997e800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8c038997e800.qos_exclude_prefixes=_temporary