From: Chris Murphy <lists@colorremedies.com>
To: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: cannot use btrfs for nfs server
Date: Sat, 10 Jul 2021 16:17:34 -0600 [thread overview]
Message-ID: <CAJCQCtQn0=8KiB=2garN8k2NRd1PO3HBnrMNvmqssSfKT2-UXQ@mail.gmail.com> (raw)
In-Reply-To: <20210710065612.GF1548@tik.uni-stuttgart.de>
On Sat, Jul 10, 2021 at 12:56 AM Ulli Horlacher
<framstag@rus.uni-stuttgart.de> wrote:
> root@tsmsrvj:# snaprotate -v test 5 /data/fex/spool
> $ btrfs subvolume snapshot -r /data/fex/spool /data/fex/spool/.snapshot/2021-07-10_0849.test
> Create a readonly snapshot of '/data/fex/spool' in '/data/fex/spool/.snapshot/2021-07-10_0849.test'
I think this might be the source of the problem. Nested snapshots are
not a good idea, it causes various kinds of confusion. It's not any
different if you do an LVM snapshot and nest a bind mount of one file
system in another. I have no idea how NFS works but it sounds to me
it's getting confused when finding the same file system inodes
multiple times and that's just what happens with snapshots. Whether
Btrfs or some other snapshotting mechanism.
> We cannot move the snapshots to a different directory. Our workflow
> depends on snaprotate:
>
> http://fex.belwue.de/linuxtools/snaprotate.html
OK does the problem happen if you have no nested snapshots (no nested
subvolumes of any kind) in the NFS export path? If the problem doesn't
happen, then either the tool you've chosen needs to be enhanced so it
will create snapshots somewhere else, which Btrfs supports, or you
need to find another tool that can.
--
Chris Murphy
next prev parent reply other threads:[~2021-07-10 22:17 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-13 3:53 any idea about auto export multiple btrfs snapshots? Wang Yugui
2021-03-10 7:46 ` nfs subvolume access? Ulli Horlacher
2021-03-10 7:59 ` Hugo Mills
2021-03-10 8:09 ` Ulli Horlacher
2021-03-10 9:35 ` Graham Cobb
2021-03-10 15:55 ` Ulli Horlacher
2021-03-10 17:29 ` Forza
2021-03-10 17:46 ` Ulli Horlacher
2021-03-10 8:17 ` Ulli Horlacher
2021-03-11 7:46 ` Ulli Horlacher
2021-07-08 22:17 ` cannot use btrfs for nfs server Ulli Horlacher
2021-07-09 0:05 ` Graham Cobb
2021-07-09 4:05 ` NeilBrown
2021-07-09 6:53 ` Ulli Horlacher
2021-07-09 7:23 ` Forza
2021-07-09 7:24 ` Hugo Mills
2021-07-09 7:34 ` Ulli Horlacher
2021-07-09 16:30 ` Chris Murphy
2021-07-10 6:35 ` Ulli Horlacher
2021-07-11 11:41 ` Forza
2021-07-12 7:17 ` Ulli Horlacher
2021-07-09 16:35 ` Chris Murphy
2021-07-10 6:56 ` Ulli Horlacher
2021-07-10 22:17 ` Chris Murphy [this message]
2021-07-12 7:25 ` Ulli Horlacher
2021-07-12 13:06 ` Graham Cobb
2021-07-12 16:16 ` Ulli Horlacher
2021-07-12 22:56 ` g.btrfs
2021-07-13 7:37 ` Ulli Horlacher
2021-07-19 12:06 ` Forza
2021-07-19 13:07 ` Forza
2021-07-19 13:35 ` Forza
2021-07-27 11:27 ` Ulli Horlacher
2021-07-09 16:06 ` Lord Vader
2021-07-10 7:03 ` Ulli Horlacher
[not found] ` <162632387205.13764.6196748476850020429@noble.neil.brown.name>
2021-07-15 14:09 ` [PATCH/RFC] NFSD: handle BTRFS subvolumes better Josef Bacik
2021-07-15 16:45 ` Christoph Hellwig
2021-07-15 17:11 ` Josef Bacik
2021-07-15 17:24 ` Christoph Hellwig
2021-07-15 18:01 ` Josef Bacik
2021-07-15 22:37 ` NeilBrown
2021-07-19 15:40 ` Josef Bacik
2021-07-19 20:00 ` J. Bruce Fields
2021-07-19 20:44 ` Josef Bacik
2021-07-19 23:53 ` NeilBrown
2021-07-19 15:49 ` J. Bruce Fields
2021-07-20 0:02 ` NeilBrown
2021-07-19 9:16 ` Christoph Hellwig
2021-07-19 23:54 ` NeilBrown
2021-07-20 6:23 ` Christoph Hellwig
2021-07-20 7:17 ` NeilBrown
2021-07-20 8:00 ` Christoph Hellwig
2021-07-20 23:11 ` NeilBrown
2021-07-20 22:10 ` J. Bruce Fields
2021-07-15 23:02 ` NeilBrown
2021-07-15 15:45 ` J. Bruce Fields
2021-07-15 23:08 ` NeilBrown
2021-06-14 22:50 ` any idea about auto export multiple btrfs snapshots? NeilBrown
2021-06-15 15:13 ` Wang Yugui
2021-06-15 15:41 ` Wang Yugui
2021-06-16 5:47 ` Wang Yugui
2021-06-17 3:02 ` NeilBrown
2021-06-17 4:28 ` Wang Yugui
2021-06-18 0:32 ` NeilBrown
2021-06-18 7:26 ` Wang Yugui
2021-06-18 13:34 ` Wang Yugui
2021-06-19 6:47 ` Wang Yugui
2021-06-20 12:27 ` Wang Yugui
2021-06-21 4:52 ` NeilBrown
2021-06-21 5:13 ` NeilBrown
2021-06-21 8:34 ` Wang Yugui
2021-06-22 1:28 ` NeilBrown
2021-06-22 3:22 ` Wang Yugui
2021-06-22 7:14 ` Wang Yugui
2021-06-23 0:59 ` NeilBrown
2021-06-23 6:14 ` Wang Yugui
2021-06-23 6:29 ` NeilBrown
2021-06-23 9:34 ` Wang Yugui
2021-06-23 23:38 ` NeilBrown
2021-06-23 15:35 ` J. Bruce Fields
2021-06-23 22:04 ` NeilBrown
2021-06-23 22:25 ` J. Bruce Fields
2021-06-23 23:29 ` NeilBrown
2021-06-23 23:41 ` Frank Filz
2021-06-24 0:01 ` J. Bruce Fields
2021-06-24 21:58 ` Patrick Goetz
2021-06-24 23:27 ` NeilBrown
2021-06-21 14:35 ` Frank Filz
2021-06-21 14:55 ` Wang Yugui
2021-06-21 17:49 ` Frank Filz
2021-06-21 22:41 ` Wang Yugui
2021-06-22 17:34 ` Frank Filz
2021-06-22 22:48 ` Wang Yugui
2021-06-17 2:15 ` Wang Yugui
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