db::StorageMode

buffer_count checkpoint_interval concurrency crypt file_mode flush_buffers open_flags page_size preallocate StorageMode

db::StorageMode::crypt Encryption callback class. Defaults to no encryption. To enable page-level encryption, subclass Crypt and assign an instance to this variable before opening or creating a database. An encrypted database must always be opened with the same encryption algorithm that was used when it was created.