Rapid Recovery by Maximizing Page-Mapping Logs Deactivation
Summary :
As NAND flash-based storage has been settled, a flash translation layer (FTL) has been in charge of mapping data addresses on NAND flash memory. Many FTLs implemented various mapping schemes, but the amount of mapping data depends on the mapping level. However, the FTL should contemplate mapping consistency irrespective of how much mapping data dwell in the storage. Furthermore, the recovery cost by the inconsistency needs to be considered for a faster storage reboot time. This letter proposes a novel method that enhances the consistency for a page-mapping level FTL running a legacy logging policy. Moreover, the recovery cost of page mappings also decreases. The novel method is to adopt a virtually-shrunk segment and deactivate page-mapping logs by assembling and storing the segments. This segment scheme already gave embedded NAND flash-based storage enhance its response time in our previous study. In addition to that improved result, this novel plan maximizes the page-mapping consistency, therefore improves the recovery cost compared with the legacy page-mapping FTL.
- Publication
- IEICE TRANSACTIONS on Information Vol.E104-D No.6 pp.885-889
- Publication Date
- 2021/06/01
- Publicized
- 2021/02/25
- Online ISSN
- 1745-1361
- DOI
- 10.1587/transinf.2020EDL8141
- Type of Manuscript
- LETTER
- Category
- Software System
Authors
Jung-Hoon KIM
Samsung Electronics Co., Ltd.
Keyword
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Jung-Hoon KIM, "Rapid Recovery by Maximizing Page-Mapping Logs Deactivation" in IEICE TRANSACTIONS on Information,
vol. E104-D, no. 6, pp. 885-889, June 2021, doi: 10.1587/transinf.2020EDL8141.
Abstract: As NAND flash-based storage has been settled, a flash translation layer (FTL) has been in charge of mapping data addresses on NAND flash memory. Many FTLs implemented various mapping schemes, but the amount of mapping data depends on the mapping level. However, the FTL should contemplate mapping consistency irrespective of how much mapping data dwell in the storage. Furthermore, the recovery cost by the inconsistency needs to be considered for a faster storage reboot time. This letter proposes a novel method that enhances the consistency for a page-mapping level FTL running a legacy logging policy. Moreover, the recovery cost of page mappings also decreases. The novel method is to adopt a virtually-shrunk segment and deactivate page-mapping logs by assembling and storing the segments. This segment scheme already gave embedded NAND flash-based storage enhance its response time in our previous study. In addition to that improved result, this novel plan maximizes the page-mapping consistency, therefore improves the recovery cost compared with the legacy page-mapping FTL.
URL: https://global.ieice.org/en_transactions/information/10.1587/transinf.2020EDL8141/_p
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@ARTICLE{e104-d_6_885,
author={Jung-Hoon KIM, },
journal={IEICE TRANSACTIONS on Information},
title={Rapid Recovery by Maximizing Page-Mapping Logs Deactivation},
year={2021},
volume={E104-D},
number={6},
pages={885-889},
abstract={As NAND flash-based storage has been settled, a flash translation layer (FTL) has been in charge of mapping data addresses on NAND flash memory. Many FTLs implemented various mapping schemes, but the amount of mapping data depends on the mapping level. However, the FTL should contemplate mapping consistency irrespective of how much mapping data dwell in the storage. Furthermore, the recovery cost by the inconsistency needs to be considered for a faster storage reboot time. This letter proposes a novel method that enhances the consistency for a page-mapping level FTL running a legacy logging policy. Moreover, the recovery cost of page mappings also decreases. The novel method is to adopt a virtually-shrunk segment and deactivate page-mapping logs by assembling and storing the segments. This segment scheme already gave embedded NAND flash-based storage enhance its response time in our previous study. In addition to that improved result, this novel plan maximizes the page-mapping consistency, therefore improves the recovery cost compared with the legacy page-mapping FTL.},
keywords={},
doi={10.1587/transinf.2020EDL8141},
ISSN={1745-1361},
month={June},}
Copy
TY - JOUR
TI - Rapid Recovery by Maximizing Page-Mapping Logs Deactivation
T2 - IEICE TRANSACTIONS on Information
SP - 885
EP - 889
AU - Jung-Hoon KIM
PY - 2021
DO - 10.1587/transinf.2020EDL8141
JO - IEICE TRANSACTIONS on Information
SN - 1745-1361
VL - E104-D
IS - 6
JA - IEICE TRANSACTIONS on Information
Y1 - June 2021
AB - As NAND flash-based storage has been settled, a flash translation layer (FTL) has been in charge of mapping data addresses on NAND flash memory. Many FTLs implemented various mapping schemes, but the amount of mapping data depends on the mapping level. However, the FTL should contemplate mapping consistency irrespective of how much mapping data dwell in the storage. Furthermore, the recovery cost by the inconsistency needs to be considered for a faster storage reboot time. This letter proposes a novel method that enhances the consistency for a page-mapping level FTL running a legacy logging policy. Moreover, the recovery cost of page mappings also decreases. The novel method is to adopt a virtually-shrunk segment and deactivate page-mapping logs by assembling and storing the segments. This segment scheme already gave embedded NAND flash-based storage enhance its response time in our previous study. In addition to that improved result, this novel plan maximizes the page-mapping consistency, therefore improves the recovery cost compared with the legacy page-mapping FTL.
ER -
English
