Azure Cosmos DB

Globally distributed, multi-model database. This skill emphasizes the Gremlin (Graph) API and covers cross-API design rules: partitioning, request units, consistency, security, and change feed.

When to Use

• Modeling highly connected data (social, fraud rings, recommendations, knowledge graphs, IT/asset topology) with the Gremlin API
• Designing partition keys and estimating RU/s for a new container
• Choosing a consistency level and multi-region write strategy
• Securing accounts with Entra ID (RBAC) and disabling key-based auth
• Implementing change feed processors, TTL-based purges, or analytical store (Synapse Link)
• Migrating between APIs (e.g., adjacency-list NoSQL graph -> Gremlin)

Decision Tree