TY - JOUR
T1 - Centaur
T2 - A Novel Architecture for Reliable, Low-Wear, High-Density 3D NAND Storage
AU - Liu, Chun Yi
AU - Kotra, Jagadish
AU - Jung, Myoungsoo
AU - Taylan Kandemir, Mahmut
N1 - Funding Information:
This research is supported by NSF grants 1439021, 1439057, 1409095,
Funding Information:
Intel. Dr. Jung is supported in part by NRF 2016R1C1B2015312, DOE
Funding Information:
Grant (G01190015), and MemRay grant (G01190170). AMD, the
Publisher Copyright:
© 2020 Copyright is held by the owner/author(s).
PY - 2020/7/8
Y1 - 2020/7/8
N2 - Due to the high density storage demand coming from applications from different domains, 3D NAND flash is becoming a promising candidate to replace 2D NAND flash as the dominant non-volatile memory. However, denser 3D NAND presents various performance and reliability issues, which can be addressed by the 3D NAND specific full-sequence program (FSP) operation. The FSP programs multiple pages simultaneously to mitigate the performance degradation caused by the long latency 3D NAND baseline program operations. However, the FSP-enabled 3D NAND-based SSDs introduce lifetime degradation due to the larger write granularities accessed by the FSP. To address the lifetime issue, in this paper, we propose and experimentally evaluate Centaur, a heterogeneous 2D/3D NAND heterogeneous SSD, as a solution. Centaur has three main components: a lifetime-aware inter-NAND request dispatcher, a lifetime-aware inter-NAND work stealer, and a data migration strategy from 2D NAND to 3D NAND. We used twelve SSD workloads to compare Centaur against a state-of-the-art 3D NAND-based SSD with the same capacity. Our experimental results indicate that the SSD lifetime and performance are improved by 3.7x and 1.11x, respectively, when using our 2D/3D heterogeneous SSD.
AB - Due to the high density storage demand coming from applications from different domains, 3D NAND flash is becoming a promising candidate to replace 2D NAND flash as the dominant non-volatile memory. However, denser 3D NAND presents various performance and reliability issues, which can be addressed by the 3D NAND specific full-sequence program (FSP) operation. The FSP programs multiple pages simultaneously to mitigate the performance degradation caused by the long latency 3D NAND baseline program operations. However, the FSP-enabled 3D NAND-based SSDs introduce lifetime degradation due to the larger write granularities accessed by the FSP. To address the lifetime issue, in this paper, we propose and experimentally evaluate Centaur, a heterogeneous 2D/3D NAND heterogeneous SSD, as a solution. Centaur has three main components: a lifetime-aware inter-NAND request dispatcher, a lifetime-aware inter-NAND work stealer, and a data migration strategy from 2D NAND to 3D NAND. We used twelve SSD workloads to compare Centaur against a state-of-the-art 3D NAND-based SSD with the same capacity. Our experimental results indicate that the SSD lifetime and performance are improved by 3.7x and 1.11x, respectively, when using our 2D/3D heterogeneous SSD.
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U2 - 10.1145/3393691.3394177
DO - 10.1145/3393691.3394177
M3 - Article
AN - SCOPUS:85088464122
SN - 0163-5999
VL - 48
SP - 93
EP - 94
JO - Performance Evaluation Review
JF - Performance Evaluation Review
IS - 1
ER -