From: "Bryn M. Reeves" <bmr@redhat.com>
To: Mark Woodward <markw@mohawksoft.com>
Cc: Linda Walsh <lvm@tlinx.org>,
LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] access or interface to list of blocks that have, changed via C.O.W.?
Date: Fri, 05 Oct 2012 10:26:32 +0100 [thread overview]
Message-ID: <506EA7C8.409@redhat.com> (raw)
In-Reply-To: <506DA504.8010509@mohawksoft.com>
On 10/04/2012 04:02 PM, Mark Woodward wrote:
> On 10/04/2012 10:44 AM, Bryn M. Reeves wrote:
>> Really? I'd be surprised if it even builds against modern kernels or
>> device-mapper.
> Well.....
> The LVM2 code that ships with most distros still uses the old interfaces
> and still (Ubuntu 12.04) seemst to create a COW file with SnAp
Yes; that's the traditional dm-snapshot target that has been in the
kernel for years. The Zumastor/ddsnap stuff was a separate project to
replace that using a new metadata format and target - they are not the
same and the Zumastor snapshot code was never merged in the kernel.
>> Snapshots using the thinp target use the metadata format described in
>> dm-thin-metadata.c.
>
> Where are these files to be found?
In drivers/md in the kernel sources - the dm-thin stuff was merged after
3.1 (October last year); see commits starting with 991d9fa.
Regards,
Bryn.
next prev parent reply other threads:[~2012-10-05 9:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.18903.1349274978.3548.linux-lvm@redhat.com>
2012-10-03 15:42 ` [linux-lvm] access or interface to list of blocks that have, changed via C.O.W.? Mark Woodward
2012-10-04 2:52 ` Linda Walsh
2012-10-04 3:41 ` Mark Woodward
2012-10-04 5:05 ` Linda Walsh
2012-10-04 10:17 ` Mark Woodward
2012-10-04 14:44 ` Bryn M. Reeves
2012-10-04 15:02 ` Mark Woodward
2012-10-04 22:00 ` Stuart D Gathman
2012-10-05 9:39 ` Bryn M. Reeves
2012-10-05 9:26 ` Bryn M. Reeves [this message]
2012-10-05 11:21 ` Mark Woodward
2012-10-16 12:15 ` Mark Woodward
2012-10-17 10:20 ` Lars Ellenberg
2012-09-28 2:51 [linux-lvm] access or interface to list of blocks that have " Linda Walsh
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