OrientDB 2.0-M3 发布，此版本现已提供下载，更新内容如下： VERSION 2.0-M3 - (November, 18th 2014) - Core: Cluster selection strategy now can decide on the input document content Better automatic alloc of Heap and Disk-Cache Clusters can be detached (offline) and re-attached (online) FetchPlan: support for wildcards Improved pools Using SIGTRAP (kill -5) to dump OrientDB information Fixed connection pool problem on high usage Cache is always ON and can’t be disabled anymore. This avoids many common issues with users - Schema: used immutable instances to reduce locking contention - Graph API: New OGraphBatchInsertBasic and OGraphBatchInsert API for massive insertion on graphs: 13x faster than Blueprints - Document API: Removed a couple of internal layers to speedup and simplify implementation - Studio: Simplified database creation (graph - no lightweight edges by default) - Console: Displayed also @class - Bug fixing: 115 total issues from 2.0-M2. 完整改进列表：https://github.com/orientechnologies/orientdb/issues?q=milestone:2.0-M3+is:closed Orient DB 是一个可伸缩的文档数据库，支持 ACID 事务处理。使用 Java 5 实现。 OrientDB 2.0-M3 发布，文档数据库下载地址
