Re: btrfs compression by default

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On Tue, Feb 9, 2021 at 1:09 AM Michel Alexandre Salim
<michel@xxxxxxxxxxxxxxx> wrote:
> Hi,
> On Mon, 2021-02-08 at 21:02 -0700, Chris Murphy wrote:
> > Hi,
> >
> > This is in regards to this Fedora 34 change:
> >
> >
> > The gist is to do 'mount -o compress=zstd:1' anytime Btrfs is used,
> > whether Destination Installation>Automatic or Custom or
> > Advanced-Custom. Apply it during the installation, and add it to
> > /etc/fstab.
> >
> > Somehow I got confused thinking that autopart supports --fsoptions,
> > and that would be the way to do this. But (a) --fsoptions isn't
> > supported with autopart, and (b) it wouldn't be a universal approach
> > anyway. And we want this to be consistent. Now I'm thinking it needs
> > to go somewhere in:
> >
> >
> >
> > Am I on the right track, or does it need to go somewhere else, or in
> > addition to that?
> >
> (I'm one of the change owners, and trying to figure this out with
> Chris).
> Ideally we have a solution that is configurable - i.e. this is exposed
> via a kickstart command (and probably entailing changes in Anaconda and
> pykickstart), but if that is not possible, or require a lot of rework
> (which we can try to work on), if we are willing to carry a patch for
> blivet or some other component to override the behavior just for Fedora
> 34, what's the best way of achieving that?
> Btrfs is probably the only filesystem with built-in compression that we
> potentially care about, so designing an interface to expose this
> functionality might be an overkill -- but we're not sure.

Eventually, VDO might get integrated into the mainline tree, so having
the interface which could be used for LVM compression through VDO
wouldn't be too bad.

真実はいつも一つ!/ Always, there's only one truth!

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