FastDb是高效的内存数据库系统，具备实时能力及便利的C++接口。FastDB不支持client-server架构因而所有使用FastDB的应用程序必须运行在同一主机上。FastDB针对应用程序通过控制读访问模式作了优化。通过降低数据传输的开销和非常有效的锁机制提供了高速的查询。对每一个使用数据库的应用数据库文件被影射到虚拟内存空间中。因此查询在应用的上下文中执行而不需要切换上下文以及数据传输。fastdb中并发访问数据库的同步机制通过原子指令实现，几乎不增加查询的开销。fastdb假定整个数据库存在于RAM中，并且依据这个假定优化了查询算法和接口。此外，fastdb没有数据库缓冲管理开销，不需要在数据库文件和缓冲池之间传输数据。这就是fastdb运行速度明显快于把数据放在缓冲池中的传统数据库的原因。-FastDb is a main memory database system efficient, real-time ability and convenient C++ interface. FastDB does not support the client-server architecture and FastDB all applications must be running on the same host. FastDB for applications by controlling the read access mode were optimized. By reducing data transmission overhead and very effective locking mechanism provides a high query. For each application database using the database files are mapped to the virtual memory space. Therefore the query execution without the need for context switching and data transmission in the application context. Synchronization mechanism to access the database concurrency in fastDB through the realization of atomic instructions, almost without increasing the cost of query. FastDB assumes that the entire database in RAM, and on the basis of this assumption to optimize the query algorithm and interface. In addition, fastDB no database buffer management overhead, do not need to transfer data between the