ArangoDB

ArangoDB is an open-source, native multi-model database management system. It combines document, graph, and key-value data models in a single engine, allowing developers to model and query diverse data without integrating multiple data stores. Documents are stored in collections, while graphs enable expressive relationships and traversals alongside standard document data.

The database uses a single query language called AQL (ArangoDB Query Language), which supports rich filtering, aggregation, joins across models, and graph traversal. It also includes the Foxx framework for writing microservices in JavaScript that run inside the database, enabling server-side logic, data processing, and API endpoints. ArangoDB supports ACID transactions across multiple collections, including multi-model operations, facilitating consistent updates in complex scenarios.

In terms of architecture, ArangoDB provides options for scaling and high availability through clustering, sharding, and replication. It can be deployed on-premises or in the cloud and offers a managed cloud service called ArangoDB Oasis. The platform supports multi-region deployments, backup and restore, and security features such as authentication, encryption, and access control. It is available in a Community (open source) edition and an Enterprise edition that adds advanced security, monitoring, and deployment capabilities.

Common use cases include real-time analytics, knowledge graphs, social networks, content management, and recommendation engines. The ecosystem offers language drivers for many programming languages and a suite of tools for administration, monitoring, and data modeling, making ArangoDB suitable for applications requiring flexible data modeling and efficient cross-model queries.