Re: Decision 4 - Name of /lib/live/mount/rofs

[Michal Suchanek <hramrach@gmail.com>]

On 3 October 2012 16:39, Daniel Baumann
<daniel.baumann@progress-technologies.net> wrote:
> On 10/03/2012 04:28 PM, Michal Suchanek wrote:
>>> i pretty sure (but i don't actually know, will have to test at a later
>>> point), that when using multiple squashfs images, you don't get multiple
>>> overlays exposed.
>
> just to be precise, sorry, i ment specifically 'in live-boot'.
>
>> You get multiple overlays when you ask for them.
>
> is it possible to have both the 'broken out' overlays, as well as a big
> unified one, at the same time? with aufs and overlayfs?

AFAIK this should be possible but is not well tested.

The limitation is that a union filesystem cannot be easily used as
writable branch for the same type of union. The union uses some
filesystem namespace subset to store union metadata in the writeble
branch and this namespace subset is not available in the union. iirc
aufs uses special file names and overlayfs extended attributes subset.

Thanks

Michal