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Re: (resolved) Re: very odd nfs behaviour

From Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups alt.os.linux.mint, comp.os.linux.networking, comp.unix.bsd.freebsd.misc
Subject Re: (resolved) Re: very odd nfs behaviour
Date 2025-01-27 23:24 +0000
Organization A noiseless patient Spider
Message-ID <vn94jm$19o0q$9@dont-email.me> (permalink)
References <vn0gn0$2ajlc$1@dont-email.me> <wwvldv0rt9i.fsf@LkoBDZeT.terraraq.uk> <vn89fh$10eh8$1@dont-email.me>

Cross-posted to 3 groups.

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On Mon, 27 Jan 2025 15:41:37 +0000, Mike Scott wrote:

> In spite of my assertion (which I should have checked and didn't), the 
> mount options differed. The working machines all specified rsize=8192. 
> My box was using a much larger figure, of 131072 (ie 32 * 4096).
> 
> It seems anything over 8192 causes this issue - that filenames get 
> truncated.

I don’t understand why increasing rsize on its own would have any
effect: according to the docs, that only controls the maximum size of
packets that this end can receive; the maximum size the other end can
send is limited by that end’s wsize value. So increasing rsize on its
own should have no effect.

Looking up NFS mount options online, this page
<https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/4/html/reference_guide/s2-nfs-client-config-options#s2-nfs-client-config-options>
does say “be careful when changing these values; some older Linux
kernels and network cards do not work well with larger block sizes”.

> Whether that's a linux client issue or a freebsd server issue, or the 
> result of interworking, I've no idea. Nor can I imagine why it should 
> happen without errors being flagged up somewhere (I checked the logs at 
> both ends) -- which is nasty, because I had a system that met the specs 
> and mostly worked but very occasionally (< about 1 in 100k times, I 
> reckon) failed silently. Ouch.

That really baffles me, that you don’t see any errors indicating there was
a problem.

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Thread

very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-24 16:56 +0000
  Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-24 17:00 +0000
  Re: very odd nfs behaviour Edmund <nomail@hotmail.com> - 2025-01-24 18:01 +0100
    Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-24 17:30 +0000
  Re: very odd nfs behaviour Richard Kettlewell <invalid@invalid.invalid> - 2025-01-24 17:55 +0000
    (resolved) Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-27 15:41 +0000
      Re: (resolved) Re: very odd nfs behaviour Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-01-27 23:24 +0000
        Re: (resolved) Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-28 08:06 +0000
          Re: (resolved) Re: very odd nfs behaviour "Carlos E.R." <robin_listas@es.invalid> - 2025-01-28 12:34 +0100
          Re: (resolved) Re: very odd nfs behaviour pinnerite <pinnerite@gmail.com> - 2025-01-28 22:58 +0000
  Re: very odd nfs behaviour azigni <azigni@yahoo.com> - 2025-01-24 19:38 +0000
  Re: very odd nfs behaviour "Carlos E.R." <robin_listas@es.invalid> - 2025-01-24 22:56 +0100
    Re: very odd nfs behaviour Paul <nospam@needed.invalid> - 2025-01-24 17:34 -0500
      Re: very odd nfs behaviour "Carlos E.R." <robin_listas@es.invalid> - 2025-01-25 01:45 +0100
    Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-25 17:02 +0000
  Re: very odd nfs behaviour Gordon <Gordon@leaf.net.nz> - 2025-01-24 23:59 +0000
  Re: very odd nfs behaviour "Arti F. Idiot" <addr@is.invalid> - 2025-01-24 17:13 -0700
  Re: very odd nfs behaviour Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-01-26 00:01 +0000
  Re: very odd nfs behaviour Grant Taylor <gtaylor@tnetconsulting.net> - 2025-01-25 20:08 -0600

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