TY - GEN
T1 - MOLAR
T2 - 15th IEEE International Conference on Cluster Computing, CLUSTER 2013
AU - Liu, Yi
AU - Ge, Xiongzi
AU - Huang, Xiaoxia
AU - Du, David H
PY - 2013
Y1 - 2013
N2 - This paper proposes a deMOtion-based, fLAsh-awaRe hybrid storage cache model, named MOLAR, to effectively integrate Flash-based Solid State Disks (SSDs) into traditional DRAM-based memory storage systems. In MOLAR, a flash-aware I/O path structure is designed to adapt the asymmetric read and write performance of SSD and moreover to reduce useless write operations. A new control metric, demotion count, is proposed to wisely select the evicted data blocks from DRAM to reside in SSD. Besides, for SSD can improve internal data placement from data access hints, the Logical Block Addresses (LBAs) in SSD are grouped into the long-lived region and the short-lived region self-adaptively via a heuristic control algorithm based on the change of data block demotion count. Through trace-driven simulations, the overall hit ratio in MOLAR outperforms two traditional policies from 1.44% to 5.34%. The average write latency in SSD is reduced by 3.5 X. Moreover, write amplification is effectively reduced by about 36% in two typical flash address mapping policies.
AB - This paper proposes a deMOtion-based, fLAsh-awaRe hybrid storage cache model, named MOLAR, to effectively integrate Flash-based Solid State Disks (SSDs) into traditional DRAM-based memory storage systems. In MOLAR, a flash-aware I/O path structure is designed to adapt the asymmetric read and write performance of SSD and moreover to reduce useless write operations. A new control metric, demotion count, is proposed to wisely select the evicted data blocks from DRAM to reside in SSD. Besides, for SSD can improve internal data placement from data access hints, the Logical Block Addresses (LBAs) in SSD are grouped into the long-lived region and the short-lived region self-adaptively via a heuristic control algorithm based on the change of data block demotion count. Through trace-driven simulations, the overall hit ratio in MOLAR outperforms two traditional policies from 1.44% to 5.34%. The average write latency in SSD is reduced by 3.5 X. Moreover, write amplification is effectively reduced by about 36% in two typical flash address mapping policies.
KW - Demotion Count
KW - Hybrid Storage Cache
KW - Solid State Drives
UR - http://www.scopus.com/inward/record.url?scp=84893622897&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893622897&partnerID=8YFLogxK
U2 - 10.1109/CLUSTER.2013.6702613
DO - 10.1109/CLUSTER.2013.6702613
M3 - Conference contribution
AN - SCOPUS:84893622897
SN - 9781479908981
T3 - Proceedings - IEEE International Conference on Cluster Computing, ICCC
BT - 2013 IEEE International Conference on Cluster Computing, CLUSTER 2013
Y2 - 23 September 2013 through 27 September 2013
ER -