GraphStore is an in-memory graph structure implementation written in Java. It is designed to be powerful, efficient and robust. It's powering the Gephi software and supports large graphs in intensive applications.

• Blazing fast graph data structure optimized for reading and writing.
• Comprehensive APIs to read and modify the graph structure.
• Low memory footprint. Reduced usage of Java objects and collections optimized for caching.
• Supports directed, undirected and mixed graphs
• Supports parallel edges. Edges can have a label.
• Any number of attributes can be associated with nodes or edges.
• Thread-safe. Implements read-write locking mechanism to allow multiple reading threads.
• Supports dynamic graphs (graphs over time).
• Built-in index on attribute values.
• Fast and compact binary serialization.

No stable version has been released yet. You can download the development version:

graphstore-0.1-SNAPSHOT.jar

GraphStore depends on FastUtil >= 6.0, Colt 1.2.0 and Joda-Time 2.2.

For a complete list of dependencies, consult the pom.xml file.

GraphStore uses Maven for building.

> cd store
> mvn clean install

> mvn test

The source code is available under the Apache 2.0 license. Contributions are welcome.