Ontotext is proud to announce version 6.6 of GraphDB – its industry leading semantic graph graph database engine. The new version includes a mass of fixes and improvements which bring GraphDB to a higher level of robustness and reliability. The most important development however is the new GraphDB Free Edition – a robust semantic graph database available for download at no cost.
GraphDB ver. 6.6 delivers over 20 improvements concerning usability, performance and cluster operation efficiency and more than 40 fixes across all types of functionality. Most of these fixes and improvements are direct result of feedback from clients that use GraphDB in a wide range of setups – all the way from mission critical multi-data-center cluster deployments to smaller, but diverse and often very advanced applications. Many improvements are result of the expansion of the test suites and the cluster testing infrastructure – an area where Ontotext made a massive investment in the recent months. More details can be found in GraphDB ver. 6.6 release notes.
GraphDB Free edition is a fully functional member of the GraphDB family. Its only limitation is that it can handle no more than two queries in parallel. GraphDB Free is appropriate for systems that require massive volumes of data, as it applies no constraints on the volumes of loaded data. It includes all the advanced features of GraphDB that make it more than a plain RDF triplestore and put it ahead of the competition: patent-pending inference implementation, geo-spatial indices, owl:sameAs optimization for more efficient integration of linked data, comprehensive full-text-search integration and many others.
GraphDB Free is a perfect starting point for smart data proof-of-concepts and for projects that require an on premise or embedded semantic graph database (cloud options are also available from Ontotext). Although GraphDB Free meets production deployment requirements primarily for systems with moderate load and availability requirements, if needed, it can be easily upgraded at deployment time to its unconstrained alternative GraphDB Standard. For heavy load business critical cluster deployments it can be upgraded to GraphDB Enterprise. This makes GraphDB Free an ideal choice for non-critical deployments, but also for laying the developmental foundations of smart data systems at all levels of ambition.
From a technical standpoint, GraphDB Free is designed as an enterprise-grade semantic repository system. Like GraphDB Standard, it is a native 100% Java file-based graph database, compliant with SPARQL and other W3C standards. It also supports graph traversal and analytics through Gremlin. In contrast to GraphDB Standard, GraphDB Free is limited to parallel evaluation of two queries only, while still all incoming queries are properly queued and executed. Even with this performance limitation, GraphDB Free is well suited for production usage in systems with moderate load or such without strict requirements for minimal response times. For instance, GraphDB Free scores 17 queries in parallel with 3.5 update transactions per second when benchmarked on 256 million statements scale factor of the Semantic Publishing Benchmark on a single CPU server with 64GB of RAM. As a free offering, GraphDB Free comes to replace GraphDB Lite – an in-memory triplestore that lacked some of the features and the comprehension of the other GraphDB editions.
GraphDB Free is available for download here.