以稳定数据库格式将数据存储在磁盘上永远都不会像把它们存储在内存中那样快，但存储速度仍然有很大的提升空间。
It'll never be as fast to store things in a stable database format on disk as to keep them only in memory, but there's still plenty of room to speed things up.
日志缓冲区——在将所有对数据库的更改刷新到磁盘上的日志之前，用来存储这些更改的内存。
Log Buffer - Memory used to store all changes to database before it is flushed to the logs on disk.
文件加密：在操作系统文件驱动层将数据库的存储文件经过加密后存储到磁盘上。
File encryption: the operating system file driver layer will be stored in the database file encrypted after storage on the disk.
文件加密：在操作系统文件驱动层将数据库的存储文件经过加密后存储到磁盘上。
File encryption: the operating system file driver layer will be stored in the database file encrypted after storage on the disk.
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