Neo是一个网络----面向网络的数据库----也就是说，它是一个嵌入式的、基于磁盘的、具备完全的事务特性的Java持久化引擎，但是它将结构化数据存储在网络上而不是表中。网络（从数学角度叫做图）是一个灵活的数据结构，可以应用更加敏捷和快速的开发模式。
Neo4j 发布了 1.8 的首个 RC 版本，对这个版本我们是非常小心的，因为很快就要发布稳定版。
Neo4j 1.8 RC1 的改进记录包括：
Kernel:
Removed contention around allocating and moving persistence windows so that a thread won't need to await another thread doing this refresh, instead just continue knowing that the windows will be optimally placed in a very near future.
Removed contention around translating a key (as String) into the ID by using copy-on-write map instead of a concurrent hash map. Used in property key as well as relationship type translation.
Fix for Node/Relationship#getPropertyValues() sometimes returning null values from the iterator.
Server:
Upgraded Jackson JAXRS to version 1.9.7
Keeping the Cypher execution engine between calls makes it possible to re-use execution plans
added User-Agent header tracking to udc to determine rest-driver usage
Cypher:
Removed the /../ literal for regular expressions. Now a normal string literal is used instead
Concatenation handles types better
Changed how the graph-matching module is used, to make it safe for concurrent use
Better type error messages
Renamed iterable to collection
Fixed #795: so that WITH keeps parameters also for empty aggregation results
Fixed #772: Creating nodes/relationships goes before SET, so SET can run on already created elements
Added error when using != instead of <>
Fixed #787: Issue when comparing array properties with literal collections
Fixed #751: Better error message for some type errors
Fixed #818: Problem where properties could only have scalar values (they can be arrays as well)
Fixed #834: Gives relevant syntax exception when properties are entered in MATCH
主页：http://neo4j.org/
下载：http://neo4j.org/download/
来自:开源中国社区
