New features:
- The Neo4j Server
The Neo4j standalone server builds upon the RESTful API that was pre-released for Neo4j 1.1. The server provides a complete stand alone Neo4j graph database experience, making it easy to access Neo4j from any programming language or platform. Some of you have already provided great client libraries for languages such as Python, Ruby, PHP, the .Net stack and more. Links and further information about client libraries can be found at: http://www.delicious.com/neo4j/drivers
- Neo4j High Availability
The High Availability feature of Neo4j provides an easy way to set up a cluster of graph databases. This allows for read scalability and tolerates faults in any of the participating machines. Writes are allowed to any machine, but are synchronized with a slight delay across all of them.
High Availability in Neo4j is still in quite an early stage of its evolution and thus still have a few limitations. While it provides scalability for read load, write operations are slightly slower. Adding new machines to a cluster still requires some manual work, and very large transactions cannot be transmitted across machines. These limitations will be addressed in the next version of Neo4j.
- Some other noteworthy changes include:
- Additional services for the Neo4j kernel can now be loaded during startup, or injected into a running instance. Examples of such additional services are the Neo4j shell server and the Neo4j management interface.
- Memory footprint and read performance has been improved.
- A new cache implementation has been added for high load, low latency workloads.
- A new index API has been added that is more tightly integrated with the database. This new index API supports indexing relationships as well as nodes, and also supports indexing and querying multiple properties for each node or relationship. The old index API has been deprecated but remains available and will continue to receive bug fixes for a while.
- The Neo4j shell supports performing path algorithm queries.
- Built in automatic feedback to improve future versions of Neo4j. See: http://blog.neo4j.org/2010/10/announcing-neo4j-12m01-and-focus-on.html
Let me repeat part of that:
This new index API supports indexing relationships as well as nodes, and also supports indexing and querying multiple properties for each node or relationship.
Will be looking at the details on the indexing, more comments to follow.