Date: Fri, 3 Aug 2012 19:25:51 -0400 (EDT) From: Rick Macklem <rmacklem@uoguelph.ca> To: =?utf-8?Q?Attila_Bog=C3=A1r?= <attila.bogar@linguamatics.com> Cc: freebsd-fs@freebsd.org Subject: Re: NFS I/O or permission denied errors Message-ID: <1737260057.298486.1344036351816.JavaMail.root@erie.cs.uoguelph.ca> In-Reply-To: <501BC236.4030607@linguamatics.com>
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Attila Bogar wrote:
> On 03/08/12 01:03, Attila Bogár wrote:
> > See the attached bash script.
> Sorry, my script has been stripped off by the list.
>
> It's nothing rocket science, takes an export list from a file
> (/root/fs.txt) and mounts the nfs shares in a loop.
>
> -- 8< --
> #!/bin/bash
>
> sleepmount=0.33
>
> function mount.all() {
> set -e
> j=0
> while read fs
> do
> echo mounting $fs
> sleep $sleepmount
> mount -t nfs -v -o sec=sys,vers=3,proto=tcp server:$fs /mnt/$j
> sleep $sleepmount
> umount -f /mnt/$j
A forced dismount (-f option) is only intended to be used when
a server is unresponsive and will result in I/O errors.
Try running the script with "-f" on umount.
> j=$[j+1]
> done < /root/fs.txt
> set +e
> }
>
> function umount.all() {
> umount -f /mnt/* &>/dev/null
> }
>
> fsno="$(wc -l /root/fs.txt|cut -d' ' -f1)"
> umount.all
> i=0;while [ $i -lt $fsno ]; do echo $i; mkdir /mnt/$i ; i=$[i+1]; done
>
> i=0
> while [ $i -lt 1000 ]
> do
> i=$[i+1]
> echo "RUN: $i" | tee /tmp/nfstest.status
> mount.all
> done
> -- 8< --
>
> sec=sys,vers=3,proto=udp seems stable, tcp gets an I/O error within
> 2-3
> minutes.
>
> I'm testing this from an up to date CentOS 6.3 nfs client.
>
> I suspicious about the network stack. I tried turning off msi and TSO
> on
> the bce card, but no change yet.
> I also took down my lagg interface and tried the onboard single bce,
> no
> change.
>
> This gentleman had a similar problem with nfsv4 but he got no hint
> from
> the list:
> http://lists.freebsd.org/pipermail/freebsd-stable/2012-June/068658.html
>
> Can someone reproduce the problem or it is specific to my hardware?
>
> Thanks,
> Attila
>
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