On Thu, Jun 21, 2018 at 4:19 PM, Dave Chinner <david@xxxxxxxxxxxxx> wrote: > The mkfs ratios are about as optimal as we can get for the > information we have about the storage - growing by > 10x (i.e. increaseing the number of AGs by 10x) puts us at the > outside edge of the acceptible filesystem performance and longevity > charcteristics. Growing by 100x puts us way outside the window, > and examples like this where we are taking about growing by 10000x > is just way beyond anything the static AG layout architecture was > ever intended to support.... OK that's useful information, thanks. What about from the other direction; is it possible to make an XFS file system too big, on an LVM thin volume? For example a 1TB drive, and I'm scratching my head at mkfs.xfs time and think maaaybe one day it could end up 25TB at the top end? So I figure do mkfs.xfs on a virtual LV of 5TB now and that gives me a 5x growfs if I really do hit 25TB one day. But for now, it's a 5TB XFS file system on a 1TB drive. Is there any negative performance effect if it turns out I never end up growing this file system (it lives forever on a 1TB drive as a 5TB virtual volume and file system)? -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
