文章基本信息

标题：Investigating of Dynamic Interval of Journaling for more Lurked Discard Regions for Flash memory Storage
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作者：Seung-Ho Lim ; Ki-Jin Kim
期刊名称：International Journal of Hybrid Information Technology
印刷版ISSN：1738-9968
出版年度：2016
卷号：9
期号：9
页码：123-134
出版社：SERSC
摘要：In modern storage system, most file system uses journaling operation to preserve data in-safe and recover fast from power loss. However, journaling operations generate excessive IO requests and degrades IO throughput. In addition to that, it also makes a lot of possible-discard regions that could be invalidated physically through discard command. However, due to it short period of time between journal transactions, there occur a lot of tiny lurked discard regions which give much overheads. In this paper, we identify that there exist many tiny lurked discard regions between successive journaling commit operations, and investigate a dynamic interval controlling scheme of journal transactions commit to reduce tiny lurked discard regions, as well as enlarge IO size of upcoming commit transaction. With the help or dynamic controlling of transaction interval, overall IO bandwidth can be enhanced.
关键词：NAND Flash Memory; Discard; Trim; Journal; Transaction Interval