[Systems] Which storage driver for Docker?

[Sam P.]

Hey Bernie,

On Sun, Nov 2, 2014 at 3:47 PM, Bernie Innocenti <bernie at codewiz.org> wrote:

> I just read this:
>
>
> http://developerblog.redhat.com/2014/09/30/overview-storage-scalability-docker/
>
> Perhaps I've been too fast to ditch btrfs: docker really needs a
> copy-on-write filesystem to store images efficiently... and btrfs is
> slower and more complicated than other filesystems *exactly* because
> it's designed to handle CoW well.
>

Sounds cool


>
> So it's a perfect fit... if it works. I'm a bit worried that the Ubuntu
> 14.04 kernel might have serious btrfs bugs, but we have no way to know
> until we hit one. Let's just make sure we have very good backups, ok? :-)
>

Well we have 2 btrfs partitions, and each is different:

- Docker images:  we have already discussed the lack of need to back these
up
- Socialhelp: we need to back this up, but this really does not need to be
on btrfs... I will migrate it soon


>
> Another concern: creating multiple btrfs volumes on top of MD and LVM is
> probably stupid: btrfs is complicated also because it handles raid and
> subvolumes at higher level. If we decide to deploy lots of containers on
> freedom, we should probably rethink the disk layout.
>

I don't think we need to, we only really need to have 1 btrfs partition -
the docker image store.  I think that the overhead on that partition won't
fill up the rest of the disk space =)


What's your opinion on this?

Sam
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sugarlabs.org/private/systems/attachments/20141103/327de8c8/attachment.html>