This article describes an internet-of-things (IoT) workload that relies on several features of the Azure Cosmos DB database service. Azure Cosmos DB is a multi-model database built for global distribution and horizontal scale.
Global distribution transparently scales and replicates data across Azure regions. You can scale throughput and storage worldwide, and pay for only the amount you need. Instant elastic scaling accommodates diverse and unpredictable IoT workloads, without sacrificing ingestion or query performance
https://learn.microsoft.com/en-us/azure/architecture/solution-ideas/articles/iot-using-cosmos-db
