From: Valerie Aurora Henson <vaurora@redhat.com>
To: Chris Mason <chris.mason@oracle.com>
Cc: Ray Van Dolson <rayvd@bludgeon.org>, linux-btrfs@vger.kernel.org
Subject: Re: Data-deduplication?
Date: Thu, 16 Oct 2008 15:25:01 -0400 [thread overview]
Message-ID: <20081016192501.GE16946@shell> (raw)
In-Reply-To: <1223895734.7032.1.camel@think.oraclecorp.com>
On Mon, Oct 13, 2008 at 07:02:14AM -0400, Chris Mason wrote:
> On Sat, 2008-10-11 at 19:06 -0700, Ray Van Dolson wrote:
> > I recall their being a thread here a number of months back regarding
> > data-deduplication support for bttfs.
> >
> > Did anyone end up picking that up and giving a go at it? Block level
> > data dedup would be *awesome* in a Linux filesystem. It does wonders
> > for storing virtual machines w/ NetApp and WAFL, and even ZFS doesn't
> > have this feature yet (although I've read discussions on them looking
> > to add it).
> >
>
> So far nobody has grabbed this one, but I've had more requests (no
> shocker there, the kvm people are interested in it too). It probably
> won't make 1.0 but the disk format will be able to support it.
Both deduplication and compression have an interesting side effect in
which a write to a previously "allocated" block can return ENOSPC.
This is even more exciting when you factor in mmap. Any thoughts on
how to handle this?
-VAL
next prev parent reply other threads:[~2008-10-16 19:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-12 2:06 Data-deduplication? Ray Van Dolson
2008-10-13 8:52 ` Data-deduplication? Andi Kleen
2008-10-15 13:39 ` Data-deduplication? Avi Kivity
2008-10-15 14:15 ` Data-deduplication? Andi Kleen
2008-10-15 14:43 ` Data-deduplication? Miguel Sousa Filipe
2008-10-15 15:00 ` Data-deduplication? Andi Kleen
2008-10-15 17:49 ` Data-deduplication? Avi Kivity
2008-10-13 11:02 ` Data-deduplication? Chris Mason
2008-10-16 19:25 ` Valerie Aurora Henson [this message]
2008-10-16 19:30 ` Data-deduplication? Chris Mason
2008-10-17 18:24 ` Data-deduplication? Valerie Aurora Henson
2008-10-20 0:16 ` Data-deduplication? Chris Mason
2008-10-21 20:33 ` Data-deduplication? Valerie Aurora Henson
2008-10-17 20:10 ` Data-deduplication? Christoph Hellwig
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