On Sat, Nov 23, 2013 at 04:00:28AM +0600, Roman Mamedov wrote:
> On Fri, 22 Nov 2013 21:26:16 + (UTC)
> Duncan <1i5t5.dun...@cox.net> wrote:
>
> > > During testing I found that the NOCOW flag prevents file cloning from
> > > working. cp --reflink fails with EINVAL when the source file has the
On Nov 22, 2013, at 9:17 AM, John Dulaney wrote:
>
> In upstream QEMU we're discussing patches that set the NOCOW flag on
> disk image files. We're told that this increases btrfs performance
> greatly since the file system will modify data in-place like ext4/xfs.
The best performing qemu/kvm r
On Fri, 22 Nov 2013 21:26:16 + (UTC)
Duncan <1i5t5.dun...@cox.net> wrote:
> > During testing I found that the NOCOW flag prevents file cloning from
> > working. cp --reflink fails with EINVAL when the source file has the
> > NOCOW flag set.
>
> That would be expected, since disabling COW mea
John Dulaney posted on Fri, 22 Nov 2013 11:17:34 -0500 as excerpted:
> In upstream QEMU we're discussing patches that set the NOCOW flag on
> disk image files. We're told that this increases btrfs performance
> greatly since the file system will modify data in-place like ext4/xfs.
Indeed. For V
- Forwarded Message -
From: "Stefan Hajnoczi"
To: "Eric Sandeen"
Cc: virt-de...@redhat.com, "Kevin Wolf"
Sent: Friday, November 22, 2013 9:20:51 AM
Subject: [virt-devel] btrfs NOCOW for VM disk images
Hi,
In upstream QEMU we're discussing patches th
