On Channel Management in Advanced Solid-State Disk Architecture

• Main Authors: Huang, Yi-Hsun, 黃義勛
• Other Authors: Chang, Li-Pin
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/64108017254404621495

碩士 === 國立交通大學 === 資訊科學與工程研究所 === 98 === With the rapid development of flash memory, the devices, similar to solid-state disks, are compliant to small form-factor but offer very high storage density. Advanced SSDs employ parallel architectures, performing like small RAIDs. The purpose is to enhance the throughput of access by side by side these channels. Traditionally, the management of these channels is the way to deal with synchronization. However, because the flash memory storage devices in general have different characteristics, synchronized channels cannot exploit the behavior of multi-channels against to the small and random write requests. Smart management of channels helps to improve parallelism of read and write. This paper proposed 3 mechanisms of channel management to improve the performance of multi-channel against to the small random write. Experimental results show that our channel management scheme, in small random write, can be 3.72 times of IOPs improvement over synchronized channels under 8 channels and 2.5% overprovision.