topology_description:
  type: Sharded
  servers:
  - &1
    address: g:27017
    avg_rtt_ms: 5
    type: Mongos
  - &2
    address: h:27017
    avg_rtt_ms: 35
    type: Mongos
operation: read
read_preference:
  mode: Nearest
  tag_sets:
  - data_center: nyc
suitable_servers:
- *1
- *2
in_latency_window:
- *1