On Nov 23, 2013, at 2:39 PM, Robert Collins <robe...@robertcollins.net>
 wrote:

> On 24 November 2013 05:42, Clayton Coleman <ccole...@redhat.com> wrote:
> 
>>> Containers will work fine in diskimage-builder. One only needs to hack
>>> in the ability to save in the container image format rather than qcow2.
>> 
>> That's good to know.  Will diskimage-builder be able to break those down 
>> into multiple layers?
> 
> What do you mean?

Docker images can be layered. You can have a base image on the bottom, and then 
an arbitrary number of deltas on top of that. It essentially works like 
incremental backups do. You can think of it as each "layer" has a parent image, 
and if they all collapse together, you get the current state. Keeping track of 
past layers gives you the potential for rolling back to a particular restore 
point, or only distributing incremental changes when you know that the previous 
layer is already on the host.

> 
> -Rob
> 
> 
> -- 
> Robert Collins <rbtcoll...@hp.com>
> Distinguished Technologist
> HP Converged Cloud
> 
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