{ "topology_description": { "type": "Sharded", "servers": [ { "address": "g:27017", "avg_rtt_ms": 5, "type": "Mongos" }, { "address": "h:27017", "avg_rtt_ms": 35, "type": "Mongos" } ] }, "operation": "write", "read_preference": { "mode": "Primary" }, "suitable_servers": [ { "address": "g:27017", "avg_rtt_ms": 5, "type": "Mongos" }, { "address": "h:27017", "avg_rtt_ms": 35, "type": "Mongos" } ], "in_latency_window": [ { "address": "g:27017", "avg_rtt_ms": 5, "type": "Mongos" } ] }