[Bug 222377] ZFS ABD wasteful...

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222377

Warner Losh <imp at FreeBSD.org> changed:

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                 CC|                            |imp at FreeBSD.org

--- Comment #6 from Warner Losh <imp at FreeBSD.org> ---
it depends on the nvme drive. nvme works better at 4k because the dma
interfaces are optimized for 4k pages.

Both nvme and ssds really want to write 4k these days (they are either 4k
native, or 4k native 512 emulated). And there's newer drives that want this to
be 16k (4k emulated 16k native).

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