which graph database to use

Are there any open-source graph-databases around which are able to store binary data, scale horizontally and optionally provide versioning of stored data?

I am overwhelmed by the sheer开发者_如何学JAVA amount of dbs out there, but none of them seems to have all the desired features.

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Look at OrientDB: open source (Apache 2 license), very fast. Supports SQL and graph GREMLIN language.

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The binary storage, horizontal scale, and versioning requirements all sound like good candidates for a BigTable model like Cassandra or HBase. If you really need a graph database, those may not be a good fit, however. If you can expand a bit more on what the requirements are, we could make a better suggestion.

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[http://en.wikipedia.org/wiki/NoSQL][1]

for example:

InfiniteGraph - High-performance, scalable, distributed Graph Database

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Horizontal scaling, look at Titan (uses Cassandra underneath): Titan homepage, Titan presentation video

For versioning your graph (if that's what you really need), you could try using Antiquity on top of a graph store.

From the Titan site:

Titan is a highly scalable graph database optimized for storing and querying massive-scale graphs containing hundreds of billions of vertices and edges distributed across a multi-machine cluster. Titan is a transactional database that can support thousands of concurrent users executing complex graph traversals.

In addition, Titan provides the following features:

• Elastic and linear scalability for a growing data and user base.
• Data distribution and replication for performance and fault tolerance.
• Multi-datacenter high availability and hot backups.
• Support for ACID and eventual consistency.
• Support for various storage backends:
  • Apache Cassandra
  • Apache HBase
  • Oracle BerkeleyDB
• Support for geo, numeric range, and full-text search via:
  • ElasticSearch
  • Apache Lucene
• Native integration with the TinkerPop graph stack:
  • Gremlin graph query language
  • Frames object-to-graph mapper
  • Rexster graph server
  • Blueprints standard graph API
• Open source with the liberal Apache 2 license.-