Dydra

What Dydra is

Dydra is a cloud graph database for information organized around relationships, including social networks, movie connections, and transaction logs. It stores information as a property graph and supports SPARQL 1.1 queries and updates, with a standard SPARQL endpoint for each repository. Repositories can import RDFa, RDF/JSON, N-Quads, N-Triples, RDF/XML, TriG, and Turtle, and export N-Triples, Turtle, and RDF/XML. The service also provides a standard REST API and a Ruby client gem that can be used as a command-line interface. Dydra says it manages the data store, including versioning, disaster recovery, and performance. Reasoning and federated queries are supported, although federation is disabled on public service accounts. The free Basic use plan costs nothing and has limited resources: evaluation accounts are limited to five queries per second, and repositories are expected to stay at or below one million statements. Public accounts also use the repository’s default graph as their fixed default graph. Dydra is based in Berlin, Germany. Customers retain ownership of their data and can delete it from the service at any time.

Who it suits

Dydra suits developers and teams building applications around connected data, such as social networking, movie relationships, or transaction logs. Getting started quickly requires familiarity with RDF and SPARQL.

Limits

The free Basic use plan has limited resources. Public evaluation accounts are limited to five queries per second and repositories are expected to stay at or below one million statements; federation is disabled and the default graph is fixed to the repository default graph.

Getting started

1. Visit https://dydra.com/.
2. Start with the free Basic use plan.
3. Create a repository and use its SPARQL endpoint.
4. Use the standard REST API or Ruby client gem to work with repositories.
5. Bring RDF familiarity and SPARQL knowledge for a quicker start.

Verdict

Choose Dydra for cloud graph applications that need property graph storage, SPARQL 1.1, and managed data store operations. Its free Basic use plan has query and repository size limits, and public accounts cannot use federation.