Ceph » rgw

I　have been trying many ways to do that,including change the config files like adding code as below
rgw zone root pool=other_pool_name
I also tried to change the set of default zone like this:
@{
"domain_root": ".rgw",
"control_pool": ".rgw.control",
"gc_pool": ".rgw.gc",
"log_pool": ".log",
"intent_log_pool": ".intent-log",
"usage_log_pool": ".usage",
"user_keys_pool": ".users",
"user_email_pool": ".users.email",
"user_swift_pool": ".users.swift",
"user_uid_pool": ".users.uid",
"system_key": {
"access_key": "",
"secret_key": ""
},
"placement_pools": [ {
"key": "default-placement",
"val": {
"index_pool": ".rgw.buckets.index",
"data_pool": "other_pool_name",
"data_extra_pool": ".rgw.buckets.extra"
}
}
]
}@
but it still didn't work,it still save data to default pool which is .rgw.buckets
I really want to know why,it's the first question i commit in tracker,if there is anything I did wrong here,please let me know.