All database tables and indexes are kept in memory and never saved to disk.
所有数据库表和索引都放在内存中,而且永远不会保存到磁盘上。
All database access in the system is made through a DAO to achieve encapsulation.
系统中的所有数据库访问都通过DAO进行以实现封装。
In other words, all database updates are no longer contained within a single unit of work.
换句话说,所有数据库更新都不再包含在一个单一的工作单元中。
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