TY - GEN
T1 - How to Enable Software Isolation and Boost System Performance with Sub-block Erase over 3D Flash Memory
AU - Chang, Hsin-Yu
AU - Ho, Chien-Chung
AU - Chang, Yuan-Hao
AU - Chang, Yu-Ming
AU - Kuo, Tei-Wei
PY - 2016/10
Y1 - 2016/10
N2 - The write amplification problem deteriorates as the block size of modern flash-memory chips keeps increasing. Without the careful garbage collection, significant live-page copying might even worsen the reliability problem, that is already severe to 3D flash memory. In this work, we propose a sub-block erase design to not only alleviate the write amplification problem by reducing livepage copying but also improve the system reliability with a software isolation strategy. In particular, sub-blocks are carefully allocated to satisfy write requests so as to reduce disturbance by using free or invalid sub-blocks as isolation layers among sub-blocks, without additional hardware cost and capacity loss. A series of experiments were conducted to evaluate the capability of the proposed design. The results show that the proposed design is very effective in improving the system performance by reducing garbage collection overheads and in improving the device reliability/lifetime.
AB - The write amplification problem deteriorates as the block size of modern flash-memory chips keeps increasing. Without the careful garbage collection, significant live-page copying might even worsen the reliability problem, that is already severe to 3D flash memory. In this work, we propose a sub-block erase design to not only alleviate the write amplification problem by reducing livepage copying but also improve the system reliability with a software isolation strategy. In particular, sub-blocks are carefully allocated to satisfy write requests so as to reduce disturbance by using free or invalid sub-blocks as isolation layers among sub-blocks, without additional hardware cost and capacity loss. A series of experiments were conducted to evaluate the capability of the proposed design. The results show that the proposed design is very effective in improving the system performance by reducing garbage collection overheads and in improving the device reliability/lifetime.
UR - http://www.scopus.com/inward/record.url?scp=84995466958&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84995466958&origin=recordpage
U2 - 10.1145/2968456.2968475
DO - 10.1145/2968456.2968475
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 978-1-4503-4483-8
T3 - Proceedings of the IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis
BT - Proceedings of the Eleventh IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis
PB - Association for Computing Machinery
T2 - 2016 International Conference on Hardware/Software Codesign and System Synthesis (CODES+ISSS 2016)
Y2 - 2 October 2016 through 7 October 2016
ER -