Zoned-WB: WriteBooster Design with Zoned Storage for User Experience on Smartphones

WriteBooster is widely adopted as a non-volatile write buffer to enhance user experience for smartphones. How-ever, the host suffers sub-optimal write performance when using WriteBooster due to the lack of utilization of rich semantic infor-mation. With the zoned storage being included in smartphones, WriteBooster design presents new opportunities. In this paper, we propose Zoned-WB, a WriteBooster management scheme based on zoned storage to utilize the rich semantic information on the host to improve user experience. Specifically, Zoned-Wb includes two parts, zoned storage-based WB and foreground request-aware WB. First, the zoned storage-based WB is aimed at designing WriteBooster management scheme based on zoned storage. Second, foreground request-aware WB is designed to adaptively adjust the capacity quota for different types of requests in Writebooster based on rich semantic information on the host. We evaluate Zoned-WB on a zoned storage emulator with workloads collected from smartphones. Evaluation results show that Zoned-Wb can effectively improve user experience.