Google Cloud Datastore
Google Cloud Datastore is a NoSQL document database built for automatic scaling, high performance, and ease of application development. While the Cloud Datastore interface has many of the same features as traditional databases, as a NoSQL database it differs from them in the way it describes relationships between data objects.
OpenCensus is used to instrument Cloud Datastore clients in the following languages:
For more information, you can read about it here and get started Datastore docs