Azure Cosmos DB (“Project Florence”) revolutionary way for globally replicating your data, multi-model database service. Azure Cosmos DB lets you store your data globally-distributed and elastically scale throughput and storage across any number of geographical regions at anytime with single click. Addition to this, Azure Cosmos DB automatically indexes your data which helps in fast querying & also guarantees millisecond latencies. On 10th May 2017 Microsoft announces general availability of Azure Cosmos DB.
Checkout msdn blog for detailed info : https://azure.microsoft.com/en-us/blog/a-technical-overview-of-azure-cosmos-db/