Paper Info
Title
FC: Built-in Flash-cache with fast cleaning for SMR Storage
Abstract
Shingled Magnetic Recording (SMR) Disks are adopted as a high-density, non-volatile media which significantly precedes conventional disks in both the storing volume and cost. However, time-consuming read-modify-writes (RMWs) significantly degrade the system performance of SMR disks. Current designs devote a portion of disk spaces as a cache to alleviate the negative effect brought by RMWs, however, when the cache is full, the cleaning process becomes the performance bottleneck of the system. This paper presents a hybrid architecture called Flash-cache (FC) to manage the SMR disks by replacing the cache with built-in NAND flash. The performance without triggering a cleaning process of FC can be comparable to that of NAND flash rather than HDDs. Furthermore, FC is capable of shrinking down the large-scale cleaning process and performing much faster cleaning. Our experimental results show that FC can shorten the overall system average response time by over 73% and improve the cleaning efficiency by approximately 11.1 times.
Year
DOI
Venue
2019
10.1109/ICESS.2019.8782438
2019 IEEE International Conference on Embedded Software and Systems (ICESS)
Keywords
Field
DocType
SMR storage,nonvolatile media,storing volume,SMR disks,disk spaces,NAND flash,large-scale cleaning process,system average response time,cleaning efficiency,shingled magnetic recording disks,RMW,built-in flash-cache
Bottleneck,Cache,Computer science,Response time,NAND gate,Real-time computing,Shingled magnetic recording,Embedded system
Conference
ISSN
ISBN
Citations 
2576-3504
978-1-7281-2438-4
0
PageRank 
References 
Authors
0.34
10
4
Name
Order
Citations
PageRank
Chenlin Ma1144.74
Zhaoyan Shen2299.79
Lei Han34511.52
Zili Shao41618134.03