Walt Mankowski via plug on 14 Nov 2025 06:34:18 -0800


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Re: [PLUG] XFS limits


On Fri, Nov 14, 2025 at 03:59:02AM -0500, brent saner via plug wrote:
> On Mon, Nov 10, 2025, 13:57 Walt Mankowski via plug <
> plug@lists.phillylinux.org> wrote:
> 
> > It turns out that the very next file bumps the total size above 4
> > TB. Regardless of the cause, it's clear that the limit exists for me.
> >
> > Which is fine. I already knew going in that I was going to have to
> > transfer the files in multiple batches. Whether I split at 4 TB or 5
> > TB doesn't matter. I made a small tweak to my script to generate
> > directories of symlinks, and I'm good to go.
> >
> > Walt
> >
> 
> Catching up on my reading, but XFS max size for files is 8EiB and max FS
> size is 1 PiB.
> 
> Yes, I realize how insane that sounds (think sparse files, for instance).
> 
> But both are well, well above the 4 TB you're hitting. Certainly seems to
> be administrative, or you're hitting a weird case where e.g. the filesystem
> is larger than the underlying physical media.

Yeah, it's weird. The user originally had about 75,000 files, taking
up nearly 10 TB of space, all in a single flat directory. On the
source filesystem this was allowed, but running 'ls' takes about a
minute.

Walt
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