== sanity test 413k: QoS mkdir exclude prefixes ========== 23:43:23 (1788925403)
lmv.lustre-clilmv-ffff8a6e4901b800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8a6e4901b800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8a6e4901b800.qos_exclude_prefixes=_temporary