A New Sequential-Write-Constrained Cache Management to Mitigate Write Amplification for SMR Drives
Refereed conference paper presented and published in conference proceedings

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AbstractShingled magnetic recording (SMR) is regarded as a promising solution for fulfilling the capacity requirement of next-generation big data applications. However, due to the sequential-write constraint of SMR drives, random-write requests could only be achieved via read-merge-write (RMW) operations, which leads to a huge amount of write amplification. SMR drives nowadays employ an on-disk persistent cache area for absorbing random-write traffic. Nevertheless, the on-disk persistent cache area cannot absorb duplicate write traffic via overwriting due to the sequential-write constraint. Such observation motivates us to propose a sequential-write-constrained cache (SWC2) management to mitigate the write amplification issue of SMR drives. The proposed strategy is implemented within the Linux system and the experimental results show that the amount of write amplification can be reduced by an average of 52.27%.
All Author(s) ListShuo-Han Chen, Yong-Ching Lin, Yuan-Hao Chang, Ming-Chang Yang, Tseng-Yi Chen, Hsin-Wen Wei, Wei-Kuan Shih
Name of Conference34th ACM/SIGAPP Annual International Symposium on Applied Computing (SAC)
Start Date of Conference08/04/2019
End Date of Conference12/04/2019
Place of ConferenceLimassol
Country/Region of ConferenceCyprus
Proceedings Title34th ACM/SIGAPP Annual International Symposium on Applied Computing (SAC)
Pages599 - 606
LanguagesEnglish-United States

Last updated on 2020-12-01 at 02:58