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SubjectRe: Btrfs v0.16 released
> So, the mirroring turns a single large write into two large writes.
> Definitely not free, but always a fixed cost.

Thanks for the explanation and the numbers. I see that's the advantage of
copy-on-write that you can actually always cluster the metadata together and
get always batched IO this way and then afford to do more of it.

Still wondering what that will do to read seekiness.

-Andi


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