== sanity test 413k: QoS mkdir exclude prefixes ========== 22:13:05 (1786414385)
lmv.lustre-clilmv-ffff915f0812a000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff915f0812a000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff915f0812a000.qos_exclude_prefixes=_temporary