On Mon, Sep 4, 2017 at 12:34 PM, Duncan <1i5t5.duncan@xxxxxxx> wrote: > * Autodefrag works very well when these internal-rewrite-pattern files > are relatively small, say a quarter GiB or less, but, again with near- > capacity throughput, not necessarily so well with larger databases or VM > images of a GiB or larger. (The quarter-gig to gig size is intermediate, > not as often a problem and not a problem for many, but it can be for > slower devices, while those on fast ssds may not see a problem until > sizes reach multiple GiB.) I have seen you stating this before about some quarter GiB filesize or so, but it is irrelevant, it is simply not how it works. See explanation of Hugo for how it works. I can post/store an actual filefrag output of a vm image that is around for 2 years on the one of my btrfs fs, then you can do some statistics on it and see from there how it works. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
