MongoDb regional replica set - primary node in each region?

Question

Given an application with regional users (regions being North America, Europe, Aisa), how do you create a replica set that allows HK users to write to the nearest nodes?

Answer 1

Have you looked into Tag Aware Sharding?

The balancer obeys tagged range associations, which enables the following deployment patterns:

• isolate a specific subset of data on a specific set of shards.
• ensure that the most relevant data reside on shards that are geographically closest to the application servers.