default file system, was: Comparison to Workstation Technical Specification

[Stephen Gallagher]

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On 02/26/2014 02:42 PM, Adam Williamson wrote:
> On Wed, 2014-02-26 at 12:18 -0700, Chris Murphy wrote:
> 
>>> I agree switching from ext4 to XFS is likely not worthwhile.
>> 
>> Whether Server WG goes with ext4 or XFS on LVM, it's worthwhile
>> for Workstation WG to mimic it merely due to simplicity because
>> then we don't need separate installers or composes.
> 
> I'm broadly in agreement with Chris here. I don't see that any
> 'plain partition' filesystem has such a huge difference to the
> other that it makes much sense for us to have two products using
> 'plain partition' filesystems, by default, but *different* ones.
> 
> Choosing btrfs by default is a controversial option, but it's at
> least clearly one with very different results from picking a 'plain
> partition' filesystem (whether backed by LVM or not). I don't
> really see the point in having ext4 for one and xfs for the other.
> If the only argument for desktop to keep ext4 if server goes xfs is
> 'btrfs conversion!', I'm with cmurf that that's not a compelling
> argument at all.
> 
> The elephant in the room here seems to be LVM backing, I don't see 
> anyone discussing that. Do desktop and server want to keep LVM
> backing by default if they don't go with btrfs? Do desktop and
> server have *differing* perspectives there? (Do we want to re-run
> the Fedora 18 tape where we switch to no LVM backing by default and
> then have to go back to LVM by default for some reason I've
> forgotten?)
> 

I can only speak for myself, but regardless of whether Server picks
ext4 or XFS, I think we definitely want it to be on LVM. (LVM
thin-provisioning is another can of worms, but let's talk about that
separately).
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