== sanity test 413k: QoS mkdir exclude prefixes ========== 23:31:09 (1789788669)
lmv.lustre-clilmv-ffff959e137fa800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff959e137fa800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff959e137fa800.qos_exclude_prefixes=_temporary