mongo单台设备分片--1:mongo单台设备分片--1 config={_id:shard1,members:[{_id: 0, host: 127.0.0.1:27018},{_id: 1, host: 127.0.0.1:27019},{_id: 2, host: 127.0.0.1:27020},{_id: 3, host: 127.0.0.1:27021}]} rs.i