btrfs plans for 15.10/16.04?

[Martinx - ジェームズ]

On 21 April 2015 at 22:23, Dimitri John Ledkov <xnox at ubuntu.com> wrote:

>
> On 21 Apr 2015 2:07 pm, "Martinx - ジェームズ" <thiagocmartinsc at gmail.com>
> wrote:
> >
> > On 21 April 2015 at 16:36, Bryan Quigley <bryan.quigley at canonical.com>
> wrote:
> >>
> >> Hi there,
> >>
> >> I'm just wondering if there are any plans to revisit btrfs as the
> default filesystem before the next LTS?
> >>
>
> So on Suse, btrfs is used for rootfs but not user storage (e.g. /home is
> on xfs). I see that attractive, as /usr is mostly read-only and only
> updated with controlled tools.
>
> >> Some key drivers I see are:
> >>  - If we want our app/snappy story to converge with systemds [1]
> >>  - LXC is even awesomer on btrfs (fast copies)
> >>
> >> AFAICT the last time this was condired was in the 12.10/13.04 timeframe
> [2].
> >>
> >> Thanks!
> >> Bryan
> >>
> >>
> >> [1]
> http://0pointer.net/blog/revisiting-how-we-put-together-linux-systems.html
> >> [2]
> https://blueprints.launchpad.net/ubuntu/+spec/foundations-r-btrfs-requirements
> >
> >
> > Hey guys!
> >
> > Let me ask something here...
> >
> > Does Canonical / Ubuntu have plans to kick apt/dpkg in favor of some
> kind of "systemd install my-package"?
> >
>
> That's not inline with systemd upstream. It only has support for offline
> updates with reboot. (See needs update conditions etc.)
>
> However see snappy / click and system image updates.
>
> > About BTRFS, it still can not be used to host KVM QCow2 images, neither
> "/var/lib/mysql" directories... Since it lacks support for DIRECT_IO.
> >
>
> Setting the flag to disable copy on write is available however.
>

Cool! Thank you for your clarification!
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