Can ZenFS support non-ZNS type SSDs？

[benqwu]

Can ZenFS support non-ZNS type SSDs, and what is the performance impact?

[yhr]

Yes, it can be supported, but one would have to implement it and benchmark it to measure the benefits. Implementing this interface for conventional drives(somehow faking zone operations) could work: https://github.com/westerndigitalcorporation/zenfs/blob/master/fs/zbdlib_zenfs.h Write amp could potentially be reduced a bit (delta conventional file systems), but probably the biggest advantage would be faster synced writes. ZenFS outperforms ext4 and xfs for small synchronized buffered(e.g. WAL) writes by about 2x.

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[benqwu]

Thank you for your reply. Does the ZenFS have a plan to support non-ZNS SSDs so that ZenFS can be applied to a wider range of scenarios?

[yhr]

I have no plans to implement support for conventional devices, but would of course happily review any pull requests in this direction :) Thanks for your interest!

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