== sanity test 413k: QoS mkdir exclude prefixes ========== 22:47:25 (1772682445)
lmv.lustre-clilmv-ffff988348eaa800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff988348eaa800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff988348eaa800.qos_exclude_prefixes=_temporary