Cosmos DB is a managed NoSQL database by Microsoft that shares traits with Cassandra, such as being distributed and horizontally scalable. It supports multiple APIs, including a Cassandra-compatible API that allows data storage using Cassandra protocol and standard drivers. Cosmos DB is integrated with other Microsoft applications and provides a quickstart guide for using its Cassandra API with Python.

1. Version 1.0
Cassandra API in Cosmos DB
Exploring CosmosDB’s relationship to Cassandra
Obioma Anomnachi
Engineer @ Anant

2. CosmosDB Overview
● Cosmos DB is a managed NoSQL database that is part of Microsoft’s Azure cloud offerings
● Cosmos DB shares some traits with Cassandra
○ Distributed - Both CosmosDB and Cassandra can be distributed globally
○ Horizontally scalable - Both NoSQL databases can be scaled via the addition of more hardware (as
contrasted with vertical scalability, the replacement of current hardware with better versions)
● Cosmos DB backs a number of other microsoft applications
○ Microsoft Office, Skype and XBOX
● Cosmos DB is multi-model

3. Multi-model APIs
● Generally, Cosmos DB stores “items” in “containers”
○ Each model’s API maps those into model specific concepts
○ Base SQL API, as well as MongoDB API (document database), Gremlin API (graph database), etcd (key, value
store)
○ Each API also allows connection via drivers native to the APIs related technologies

4. Cosmos DB and Cassandra
● Cosmos DB Cassandra API allows storage of data in CosmosDB using Cassandra protocol
○ Can connect with standard Cassandra drivers
○ Can connect via cqlsh
● Compatible with (and separate from) Azure Managed Instance for Apache Cassandra

5. Demo
● https://github.com/Anant/cassandra.api

6. Resources
● Quickstart: Cassandra API with Python - Azure Cosmos DB
● Apache Cassandra features supported by Azure Cosmos DB Cassandra API

7. Strategy: Scalable Fast Data
Architecture: Cassandra, Spark, Kafka
Engineering: Node, Python, JVM,CLR
Operations: Cloud, Container
Rescue: Downtime!! I need help.
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