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Cloud Computing · Intermediate

Azure Cosmos DB

Azure fully managed, globally distributed NoSQL and relational database with multiple APIs and single-digit millisecond latency.

Definition

Cosmos DB offers APIs for NoSQL, MongoDB, Apache Cassandra, Apache Gremlin and Table, plus a PostgreSQL option. Throughput is measured in request units (RU/s), provisioned or serverless or autoscale. It provides turnkey multi-region replication, multi-region writes and five consistency levels with SLAs covering availability, latency and throughput.

Example

A global retail app replicates its Cosmos DB account to four regions with multi-region writes enabled.

Exam tip

Global distribution with tunable consistency is the Cosmos DB hallmark; know the API to choose for migrating MongoDB or Cassandra apps.

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