[dm-devel] [DRAFT] Snapshot boot design document

[Thorsten Kukuk]

On Wed, Jun 07, Thorsten Kukuk wrote:

> 
> Hi,
> 
> On Thu, Jun 01, Bryn M. Reeves wrote:
> 
> > We're drafting a proposal for a generic snapshot boot mechanism, to
> > allow booting into previous snapshots of the system for LVM2 and
> > BTRFS volumes (as well as Stratis[1] in the future).
> 
> I like that proposal.
> 
> Some comments from me:

One more: please don't forget read-only root filesystems with all of
your designs. btrfs snapshots are read-only, so if you boot an old
snapshot, you have a read-only root filesystem.
And if you play with transactional updates by snapshots and rollback,
you will really like read-only root filesystems.

  Thorsten

-- 
Thorsten Kukuk, Distinguished Engineer, Senior Architect SLES & CaaSP
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nuernberg, Germany
GF: Felix Imendoerffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nuernberg)