== sanity test 413k: QoS mkdir exclude prefixes ========== 12:25:18 (1783355118)
lmv.lustre-clilmv-ffff922e89d92000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff922e89d92000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff922e89d92000.qos_exclude_prefixes=_temporary