我用pd ctl查看到这个，不知道什么意思，看文档说 * extra-peer：多副本的 Region。不过集群是刚初始化的，什么都没配置，应该都是3副本才对，这个多副本又是啥
» region check extra-peer
{
“count”: 1,
“regions”: [
{
“id”: 83680,
“start_key”: “7480000000000000FFB65F698000000000FF0000020169000000FF00000000F8016D31FF333831303035FF33FF33373600000000FBFF0131333831303035FF33FF333736000000FF0000FA0000000000FA”,
“end_key”: “7480000000000000FFB65F698000000000FF0000020169000000FF00000000F8016D31FF353834373538FF35FF33383100000000FBFF0131353834373538FF35FF333831000000FF0000FA0000000000FA”,
“epoch”: {
“conf_ver”: 42,
“version”: 116
},
“peers”: [
{
“id”: 83681,
“store_id”: 5,
“role_name”: “Voter”
},
{
“id”: 83682,
“store_id”: 6,
“role_name”: “Voter”
},
{
“id”: 83683,
“store_id”: 2,
“role_name”: “Voter”
},
{
“id”: 83684,
“store_id”: 7,
“role”: 1,
“role_name”: “Learner”,
“is_learner”: true
}
],
“leader”: {
“id”: 83681,
“store_id”: 5,
“role_name”: “Voter”
},
“cpu_usage”: 0,
“written_bytes”: 1921387,
“read_bytes”: 0,
“written_keys”: 2365,
“read_keys”: 0,
“approximate_size”: 549,
“approximate_keys”: 3655815
}
]
}