LVM in default filesystem layout

[Josh Boyer]

On Tue, May 5, 2015 at 8:32 AM, Ray Strode <rstrode at redhat.com> wrote:
> Hi,
>
>> On Tue, May 5, 2015 at 12:47 PM, Bastien Nocera <bnocera at redhat.com> wrote:
>> >> blivet-gui works OK for some bits of LVM, it's a frontend for the same
>> >> library used in anaconda, it depends on what functionality the
>> >> Workstation people expect though, it doesn't for example support the
>> >> use of things like LVM snapshots, roll back of snapshots etc.
>> >
>> > On a workstation or laptop, LVM's main use is to encrypt the disks.
>>
>> huh? you don't need lvm for disk encryption.
>
> Well, you do need device mapper, for how we do encryption, though, and of course,
> you can't have LVM without device mapper.

That is true, but it's beside the point.  Throwing out device mapper
just because LVM is built on top of it seems pretty silly.

> I think getting rid of device mapper is a good, related, goal, too. Both LVM and
> device mapper add layers of complexity that, while useful in some contexts, aren't
> really necessary in a lot of common workstation cases.

If you read the article comments, the _author_ of the ext4 encryption
work says for single user laptops he would recommend sticking with
dm-crypt for now.

http://lwn.net/Articles/640015/

You guys are sure excited to dump something that is proven to work
(and allows flexibility in the filesystem on top of it) for something
new and shiny.  Let's back off for a bit and give this time to mature.

josh