The Perl Toolchain Summit needs more sponsors. If your company depends on Perl, please support this very important event.
---
topology_description:
  type: Sharded
  servers:
  - &1
    address: g:27017
    avg_rtt_ms: 5
    type: Mongos
    tags:
      data_center: nyc
  - &2
    address: h:27017
    avg_rtt_ms: 35
    type: Mongos
    tags:
      data_center: dc
operation: read
read_preference:
  mode: SecondaryPreferred
  tag_sets:
  - data_center: nyc
suitable_servers:
- *1
- *2
in_latency_window:
- *1