The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
À mesure que le stockage flash NAND a été mis en place, une couche de traduction flash (FTL) a été chargée de mapper les adresses de données sur la mémoire flash NAND. De nombreux FTL ont mis en œuvre divers schémas de cartographie, mais la quantité de données cartographiques dépend du niveau de cartographie. Cependant, le FTL devrait envisager la cohérence du mappage quelle que soit la quantité de données cartographiques stockées dans le stockage. De plus, le coût de récupération dû à l'incohérence doit être pris en compte pour un temps de redémarrage du stockage plus rapide. Cette lettre propose une nouvelle méthode qui améliore la cohérence d'un FTL au niveau du mappage de pages exécutant une politique de journalisation héritée. De plus, le coût de récupération des mappages de pages diminue également. La nouvelle méthode consiste à adopter un segment virtuellement réduit et à désactiver les journaux de mappage de pages en assemblant et en stockant les segments. Ce schéma de segment a déjà permis au stockage flash NAND intégré d'améliorer son temps de réponse dans notre étude précédente. En plus de ce résultat amélioré, ce nouveau plan maximise la cohérence du mappage de page, améliorant ainsi le coût de récupération par rapport au FTL de mappage de page existant.
Jung-Hoon KIM
Samsung Electronics Co., Ltd.
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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},}
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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 -