Re: [PATCH 00/13] Pass data temperature information to zoned UFS devices

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On 9/21/23 12:46, Matthew Wilcox wrote:
If vendor support already exists, then why did you dodge the question
asking for quantified data that I asked earlier?  And can we have that
data now?

From Rho, Eunhee, Kanchan Joshi, Seung-Uk Shin, Nitesh Jagadeesh Shetty, Jooyoung Hwang, Sangyeun Cho, Daniel DG Lee, and Jaeheon Jeong. "{FStream}: Managing Flash Streams in the File System." In 16th USENIX Conference on File and Storage Technologies (FAST 18), pp. 257-264. 2018: "Experimental results show that FStream enhances the filebench performance by 5%∼35% and reduces WAF (Write Amplification Factor) by 7%∼46%. For a NoSQL database benchmark, performance is improved by up to 38% and WAF is reduced by up to 81%." Please note that these results are for ext4 instead of F2FS. The benefit for F2FS is probably smaller since F2FS is optimized for NAND flash media.

I have Cc-ed open source contributors from multiple UFS vendors on this email and I hope that they can share performance numbers for F2FS.



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