db4o 8.0候選版發佈了！db4o 是一個開源的純面向對象數據庫引擎，對於 Java 與 .NET 開發者來說都是一個簡單易用的對象持久化工具，使用簡單。同時，db4o 已經被第三方驗證爲具有優秀性能的面向對象數據庫。
查看db4o詳細介紹：http://www.ibm.com/developerworks/cn/java/j-lo-db4o1/
8.0最終版的特性：
- 重要性能
- Internal Id system ( pluggable per our preferred approach ) will help with improving I/O, clustering, defragmentation, etc. *
- Improved Memory Manager - reduces heap space by factor of 2
- New cache options for different workloads
- Fast Collection implementations ( BigSet )
- Custom Type Handlers
- Object pre-fetching for client/server optimization
- 主要功能
- Replication from db4o to big brother Versant. *
- TP/TA for Java and .NET collections *
- Silverlight and Mono support
- .NET LINQ provider
- Internationalization - Unicode, now also UTF-8 and other string encodings .. support Chinese, Japanese character sets
- 主要開源代碼
- Expanded Open-Source licensing - Microsoft (Ms-PL, Ms-RL ) , FLOSS licenses, compatibility with GPL_v3
- Open source of OME as Eclipse and Visual Studio plugins
- DZone RefCard and new tech videos and podcasts
- Android demo applications like MapMe
- Eclipse and Visual Studio TA/TP plugins available
- 主要使用功能
- Secure Socket communications ( pluggable sockets )
- Introduction of Maven snapshot repository
- ADO .NET Data Services interface ( IQueryable, IUpdateable )
- New runtime statistics gathering and visual profilers
- mdRS - mobile dRS for Google Android users needing replication to relational database
- Spring db4o Extension
- Support for Array of Nullable types
- New configuration Interfaces for simplified use
- Support for .NET enums as value types
- First db in industry to support LINQ on CompactFramework
- .NET Generic collection support
- Commit callbacks for pushed updates to client caches
- TP for .NET LINQ provider
- Collection aware dRS implementation