1{
2  "topology_description": {
3    "type": "ReplicaSetWithPrimary",
4    "servers": [
5      {
6        "address": "b:27017",
7        "avg_rtt_ms": 5,
8        "type": "RSSecondary",
9        "tags": {
10          "data_center": "nyc"
11        }
12      },
13      {
14        "address": "c:27017",
15        "avg_rtt_ms": 100,
16        "type": "RSSecondary",
17        "tags": {
18          "data_center": "nyc"
19        }
20      },
21      {
22        "address": "a:27017",
23        "avg_rtt_ms": 26,
24        "type": "RSPrimary",
25        "tags": {
26          "data_center": "nyc"
27        }
28      }
29    ]
30  },
31  "operation": "read",
32  "read_preference": {
33    "mode": "Nearest",
34    "tag_sets": [
35      {
36        "data_center": "sf"
37      }
38    ]
39  },
40  "suitable_servers": [],
41  "in_latency_window": []
42}
43