I think in principle: No.
It is something that should be documented as advise in the VM software
documentation. But things like storage management is the domain of the
distribution or systems administrator.
There might be a situation where the VM software can directly use a
btrfs filesystem
On Feb 25, 2014, at 2:16 AM, Justin Ossevoort jus...@internetionals.nl wrote:
I think in principle: No.
It is something that should be documented as advise in the VM software
documentation. But things like storage management is the domain of the
distribution or systems administrator.
Put me in on Team Justin on this particular issue. I get and grant that
in some use cases you might get pathological behavior out of DB or VM
binaries which aren't set NODATACOW, but in my own use - including
several near-terabyte-size VM images being used by ten+ people all day
long for
On Tue, 25 Feb 2014 10:44:36 -0700
Chris Murphy li...@colorremedies.com wrote:
the VM managing application needs to set +C on image files
It's a slippery slope, why not instigate that every program from now on has
to set +C on its user files? Or where do we stop, probably the browser should
On Feb 25, 2014, at 10:53 AM, Jim Salter j...@jrs-s.net wrote:
IME, IMO, the potential performance problems with COW and db/vm do /exist/
but they're way, WAY overstated, and unlikely to rear their heads at all in
the majority of use-cases.
Right. Unfortunately I'm only aware of such
Chris Murphy posted on Tue, 25 Feb 2014 11:33:34 -0700 as excerpted:
I've had a qcow2 image with more than 30,000 extents and didn't notice a
performance drop. So I don't know that number of extents is the problem.
Maybe it's how they're arranged on disk and what's causing the problem
is
Use case is a user who doesn't know that today xattr +C ought to be set on vm
images when on Btrfs. They use e.g. Gnome Boxes, or Virtual Machine Manager
(virt-manager) to configure pools, images, and VMs.
If libvirt were to set +C on any containing directory configured as a pool,
then any
Chris Murphy posted on Fri, 21 Feb 2014 09:55:50 -0700 as excerpted:
Use case is a user who doesn't know that today xattr +C ought to be set
on vm images when on Btrfs. They use e.g. Gnome Boxes, or Virtual
Machine Manager (virt-manager) to configure pools, images, and VMs.
If libvirt were
