TY - GEN
T1 - Enhancing SSD reliability through efficient RAID support
AU - Kim, Jaeho
AU - Lee, Jongmin
AU - Choi, Jongmoo
AU - Lee, Donghee
AU - Noh, Sam H.
PY - 2012
Y1 - 2012
N2 - A serious problem with current SSDs is its low reliability due to their primary component, flash-memory, that has high error rate and limited erase count. Adopting RAID architecture is a reasonable way to increase reliability of SSDs. In this paper, we propose Dynamic and Variable Size Striping-RAID (DVS-RAID) that dynamically constructs a variable size stripe based on arrival order of write requests such that write requests are sequentially written to a stripe improving the performance and lifetime of SSDs. To increase the reliability of small writes without making use of non-volatile RAM, DVS-RAID employs variable size striping, which constructs a new stripe with data written to portions of a full stripe and writes a parity for that partial stripe. We implement DVS-RAID in the DiskSim SSD extension, and experimental results based on trace-driven simulations show that DVS-RAID out-performs the conventional RAID-5 scheme in terms of performance and lifetime of SSDs.
AB - A serious problem with current SSDs is its low reliability due to their primary component, flash-memory, that has high error rate and limited erase count. Adopting RAID architecture is a reasonable way to increase reliability of SSDs. In this paper, we propose Dynamic and Variable Size Striping-RAID (DVS-RAID) that dynamically constructs a variable size stripe based on arrival order of write requests such that write requests are sequentially written to a stripe improving the performance and lifetime of SSDs. To increase the reliability of small writes without making use of non-volatile RAM, DVS-RAID employs variable size striping, which constructs a new stripe with data written to portions of a full stripe and writes a parity for that partial stripe. We implement DVS-RAID in the DiskSim SSD extension, and experimental results based on trace-driven simulations show that DVS-RAID out-performs the conventional RAID-5 scheme in terms of performance and lifetime of SSDs.
UR - http://www.scopus.com/inward/record.url?scp=84867021075&partnerID=8YFLogxK
U2 - 10.1145/2349896.2349900
DO - 10.1145/2349896.2349900
M3 - Conference contribution
AN - SCOPUS:84867021075
SN - 9781450316699
T3 - Proceedings of the Asia-Pacific Workshop on Systems, APSYS'12
BT - Proceedings of the Asia-Pacific Workshop on Systems, APSYS'12
T2 - Asia-Pacific Workshop on Systems, APSYS 2012
Y2 - 23 July 2012 through 24 July 2012
ER -