Evaluating Non-In-Place Update Techniques for Flash-Based Transaction Processing Systems

Recently, flash memory is emerging as the storage device. With price sliding fast, the cost per capacity is approaching to that of SATA disk drives. So far flash memory has been widely deployed in consumer electronics even partly in mobile computing environments. For enterprise systems, the deployment has been studied by many researchers and developers. In terms of the access performance characteristics, flash memory is quite different from disk drives. Without the mechanical components, flash memory has very high random read performance, whereas it has a limited random write performance because of the erase-beforewrite design. The random write performance of flash memory is comparable with or even worse than that of disk drives. Due to such a performance asymmetry, naive deployment to enterprise systems may not exploit the potential performance of flash memory at full blast. This paper studies the effectiveness of using non-in-place-update (NIPU) techniques through the IO path...

• Type: Conference
• Year: 2009
• Where: DEXA
• Authors: Yongkun Wang, Kazuo Goda, Masaru Kitsuregawa
• Keywords: Database, DEXA 2009, Disk Drives, Random Write Performance, flash Memory