Using ReadPreference command with Azure Cosmos DB for MongoDB API
Azure Cosmos DB is a fully managed globally distributed, multi-model database service, transparently replicating your data across any number of Azure regions. You can elastically scale throughput and storage, and take advantage of fast, single-digit-millisecond data access using the API of your choice backed by 99.999 SLA. This sample shows you how to use ReadPreference command against Azure Cosmos DB for MongoDB API from a NodeJS application.
Running this sample
Before you can run this sample, you must have the following prerequisites:
Then, clone this repository.
Next, substitute the
readFromRegionin App.Config with your Cosmos DB account's values.
npm installto install dependencies (mongo driver)
About the code
The code included in this sample is intended to illustrate using ReadPreference and tags with Azure Cosmos DB for MongoDB API for performing reads across geo replicated read regions.