教師資料查詢 | 類別: 期刊論文 | 教師: 衛信文 Wei, Hsin-Wen (瀏覽個人網頁)

標題:wrJFS: A Write-Reduction Journaling File System for Byte-addressable NVRAM
學年106
學期2
出版(發表)日期2018/07/01
作品名稱wrJFS: A Write-Reduction Journaling File System for Byte-addressable NVRAM
作品名稱(其他語言)
著者Tseng-Yi Chen; Yuan-Hao Chang; Shuo-Han Chen; Chih-Ching Kuo; Ming-Chang Yang; Hsin-Wen Wei; Wei-Kuan Shih
單位
出版者
著錄名稱、卷期、頁數IEEE Transactions on Computers 67(7), p.1023-1038
摘要Non-volatile random-access memory (NVRAM) becomes a mainstream storage device in embedded systems due to its favorable features, such as small size, low power consumption, and short read/write latency. Unlike dynamic random access memory (DRAM), NVRAM has asymmetric performance and energy consumption on read/write operations. Generally, on NVRAM, a write operation consumes more energy and time than a read operation. Unfortunately, current mobile/embedded file systems, such as EXT2/3 and EXT4, are very unfriendly for NVRAM devices. The reason is that current mobile/embedded file systems employ a journaling mechanism for increasing its data reliability. Although a journaling mechanism raises the safety of data in a file system, it also repeatedly writes data to a data storage while data is committed and checkpointed. Though several related works have been proposed to reduce the amount of write traffic to NVRAM, they still cannot effectively minimize the write amplification of a journaling mechanism. Such observations motivate us to design a two-phase write reduction journaling file system called wrJFS. In the first phase, wrJFS classified data into two categories: Metadata and user data. As the size of metadata is usually very small (few bytes), byte-enabled journaling strategy will handle metadata during commit and checkpoint stages. In contrast, the size of user data is very large relative to metadata; thus, user data will be processed in the second phase. In the second phase, user data will be compressed by hardware encoder to reduce the write size and managed compressed-enabled journaling strategy to avoid the write amplification on NVRAM. Moreover, we analyze the overhead of wrJFS and show that the overhead is negligible. According to the experimental results, the proposed wrJFS outperforms other journaling file systems even though the experiments include the overhead of data compression.
關鍵字
語言英文
ISSN
期刊性質國外
收錄於SCI;EI;
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,電子版
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