From: Ric Wheeler <ricwheeler@gmail.com>
To: Miklos Szeredi <miklos@szeredi.hu>,
Christoph Hellwig <hch@infradead.org>
Cc: Michal Suchanek <hramrach@centrum.cz>,
Ian Kent <ikent@redhat.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
David Howells <dhowells@redhat.com>,
Jeff Moyer <jmoyer@redhat.com>
Subject: Re: Unionmount status?
Date: Thu, 14 Apr 2011 09:21:38 -0400 [thread overview]
Message-ID: <4DA6F4E2.1060005@gmail.com> (raw)
In-Reply-To: <BANLkTimD9WB_RP1j8yJR7GUn_NuDuM2SHw@mail.gmail.com>
On 04/14/2011 05:40 AM, Miklos Szeredi wrote:
> On Thu, Apr 14, 2011 at 11:32 AM, Michal Suchanek<hramrach@centrum.cz> wrote:
>> I guess overlayfs includes the better part of unionmount and achieves
>> similar level of functionality in much smaller code size and is
>> actively developed.
>>
>> This might make it the best candidate for inclusion so far.
>>
>> It does not (yet?) support NFS which is one of the options commonly
>> used with union solutions, though.
> NFS is supported as a lower (read-only) layer, but not as an upper
> (read-write) layer.
>
> Thanks,
> Miklos
I am not that concerned with the state of Val's repo, her intention was to hand
off the project cleanly to others and have them drive the code (that hand off
was the posting of the patch set). Several people (Ian, David Howells and Al
Viro) had been involved with union mounts recently, so we do have reasonable
candidates for a hand off.
One of the concerns with unionfs is the duplication of data. Union mounts avoids
this with that implementation. That might make unionfs more of a burden for very
large file systems, but probably not a concern for many use cases.
The union mount patch set is certainly considerably larger.
Christoph had expressed some concerns about locking that I think it would be
good to discuss again as well.
Ric
next prev parent reply other threads:[~2011-04-14 13:21 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-12 15:00 Unionmount status? Michal Suchanek
2011-04-12 20:31 ` Ric Wheeler
2011-04-12 21:36 ` Michal Suchanek
2011-04-13 14:18 ` Jiri Kosina
2011-04-13 15:13 ` Michal Suchanek
2011-04-14 8:38 ` Miklos Szeredi
2011-04-14 9:48 ` Sedat Dilek
2011-04-14 9:58 ` Miklos Szeredi
2011-04-15 11:22 ` Michal Suchanek
2011-04-15 11:31 ` Miklos Szeredi
2011-04-15 11:51 ` Michal Suchanek
2011-04-15 12:29 ` Miklos Szeredi
2011-04-15 12:34 ` Michal Suchanek
2011-04-15 12:48 ` Miklos Szeredi
2011-04-15 21:48 ` Hugh Dickins
2011-04-15 22:18 ` Andreas Dilger
2011-04-18 13:31 ` Michal Suchanek
2011-04-19 20:04 ` [PATCH] tmpfs: implement generic xattr support Miklos Szeredi
2011-04-20 2:18 ` Phillip Lougher
2011-04-20 13:43 ` Miklos Szeredi
2011-04-21 6:59 ` Michal Suchanek
2011-04-21 9:08 ` Miklos Szeredi
2011-04-21 10:59 ` Michal Suchanek
2011-04-21 14:58 ` Jordi Pujol
2011-04-21 15:22 ` Michal Suchanek
2011-04-21 15:43 ` Michal Suchanek
2011-04-21 17:26 ` Miklos Szeredi
2011-04-21 19:17 ` Michal Suchanek
2011-04-20 16:00 ` Serge E. Hallyn
2011-05-12 4:20 ` Hugh Dickins
2011-05-12 7:52 ` Michal Suchanek
2011-05-12 12:27 ` Miklos Szeredi
2011-05-12 14:00 ` Miklos Szeredi
2011-05-12 16:52 ` Hugh Dickins
2011-04-18 13:34 ` Unionmount status? Michal Suchanek
2011-04-18 13:37 ` Michal Suchanek
2011-04-13 17:26 ` Ric Wheeler
2011-04-13 18:58 ` Michal Suchanek
2011-04-13 19:11 ` Ric Wheeler
2011-04-13 19:47 ` Michal Suchanek
2011-04-14 4:50 ` Ian Kent
2011-04-14 9:32 ` Michal Suchanek
2011-04-14 9:40 ` Miklos Szeredi
2011-04-14 13:21 ` Ric Wheeler [this message]
2011-04-14 14:54 ` Michal Suchanek
2011-04-15 16:31 ` Ric Wheeler
2011-04-14 19:14 ` David Howells
2011-06-29 9:39 ` Union mount and overlayfs bake off? Ric Wheeler
2011-06-29 11:40 ` Michal Suchanek
2011-06-29 10:17 ` David Howells
2011-06-30 12:44 ` Miklos Szeredi
2011-07-10 8:28 ` Union mount and lockdep design issues Ric Wheeler
2011-07-10 13:48 ` Peter Zijlstra
2011-07-11 8:35 ` Michal Suchanek
2011-07-11 11:01 ` David Howells
2011-07-11 12:00 ` Peter Zijlstra
2011-07-11 13:36 ` Michal Suchanek
2011-07-11 13:50 ` Ian Kent
2011-07-11 16:17 ` Michal Suchanek
2011-07-11 17:23 ` Ian Kent
2011-07-11 18:08 ` Michal Suchanek
2011-07-12 8:30 ` Miklos Szeredi
2011-07-12 9:58 ` Michal Suchanek
2011-07-12 11:45 ` Miklos Szeredi
2011-07-12 18:49 ` Michal Suchanek
2011-07-13 9:49 ` Miklos Szeredi
2011-07-13 12:02 ` David Howells
2011-07-13 13:20 ` Miklos Szeredi
2011-07-14 0:57 ` David Howells
2011-07-11 13:54 ` David Howells
2011-07-11 14:02 ` Peter Zijlstra
2011-07-11 14:50 ` [PATCH 1/2] VFS: Pass mount flags to sget() David Howells
2011-07-11 14:50 ` [PATCH 2/2] union-mount: Duplicate the i_{, dir_}mutex lock classes and use for upper layer David Howells
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