LVM in default filesystem layout

[Josh Boyer]

On Tue, May 5, 2015 at 7:58 AM, drago01 <drago01 at gmail.com> wrote:
> On Tue, May 5, 2015 at 12:47 PM, Bastien Nocera <bnocera at redhat.com> wrote:
>>
>>
>> ----- Original Message -----
>>> On Tue, May 5, 2015 at 12:17 AM, Lars Seipel <lars.seipel at gmail.com> wrote:
>>> > On Mon, May 04, 2015 at 04:24:13PM -0400, Christian Schaller wrote:
>>> >> If we haven't done so already I think we should since we don't really have
>>> >> any UI tools for editing LVM partitions
>>> >
>>> > Palimpsest/gnome-disk-utility used to have LVM support. What happened to
>>> > it?
>>>
>>> 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.

Right.  dm-crypt is what is most common.

So I think hanging our encryption efforts on ext4 encryption at this
point is premature.  The comments in the article Bastien linked to are
actually pretty good, and Ted and Michael spent time clarifying and
answering questions.  For a single user laptop, dm-crypt performance
is likely going to be on-par with ext4 encryption, or at least close
enough to not have us jumping on ext4 immediately.  For multi-user
systems, ext4 is a slightly more intriguing option since you don't
have one single key for the whole system.  But that tends to not be
the user base Workstation is targeting.

At the moment this is all moot anyway, because the feature just got
merged with 4.1 and it's disabled in the Fedora kernel for now.  I'm
not even sure userspace is ready to leverage this yet either.

josh