A Dynamic Logging Approach on Flash-Based DBMS

Flash memory, especially NAND flash memory, is being rapidly deployed as data storage for mobile devices such as mobile phones, digital cameras and PDApsilas. With its capacity increasing and price dropping, flash memory has been installed in many portable computers instead of magnetic disk for its light weight, small size, physical stability and low power consumption. We may expect that flash memory will finally take the place of magnetic disk in the next few years. Therefore, it is possible for us to consider running a full database on the flash computing platforms. However, disk-based database technology can not be used on flash memory directly because of different characteristics between flash memory and magnetic disk. Some researches are being done currently on flash-based database technology. In this paper, we propose a new approach called dynamic logging. This new approach makes use of the characteristics of flash memory effectively to acquire more benefits from using traditional database technology on flash memory.