What is Azure Cosmos DB?

• A globally distributed, horizontally partitioned, multi-model database service
• A multi-model, multi-API database service
• Designed to elastically and independently scale throughput and storage across any number of geographical regions
• Details: https://docs.microsoft.com/en-us/azure/cosmos-db/introduction

[Image courtesy: Microsoft docs]

Why to use Cosmos DB?

• Turnkey global distribution
  • Quickly replicate your data to a new location
  • Manual and automatic failover
  • Supports multi-read and multi-write
• Elastic storage and throughput
  • Scale throughput to millions of requests per second
  • Storage automatically scales to your needs
  • Pay for consumption, no pre-provision
• Low latency
  • Read request: < 10 ms
  • Write request: < 10 ms
• Flexible consistency model: 5 consistency models
• Enterprise-grade security
  • Encryption at rest and in transit
  • Encryption is automatic and enabled by default
  • Supports IP-based access control

Key Benefits

• Guaranteed speed at any scale: fast global access, and instant elasticity
• Simplified application development: open source APIs, multiple SDKs, schemaless data
• Mission-critical ready: 99.999% availability, and enterprise-level security for every application
• Fully managed and cost-effective: End-to-end database management, with serverless and automatic scaling matching your application and TCO needs