Size limits for images in xenial and beyond?

[Steve Langasek]

Hi Tim,

On Mon, May 02, 2016 at 12:30:06PM +1000, Tim wrote:
> Hi Steve,

>    Ubuntu GNOME decided a while back that our hard size limit would be to
> fit on a 2GB usb stick, and just aim internally not to unnecessarily bloat
> the images.  We just never got around to getting the limits officially
> bumped up.

Ok, so this supersedes the previous limit of 1GiB that's currently encoded?
Should this 2GB limit be retroactive for trusty point release images, as
well?  (Not currently needed, the trusty dailies are < 1GiB)

> I don't think we need to be subscribed to oversize emails, the oversized
> warnings are displayed in enough places, that it would be hard to miss.

So that means these warnings weren't missed? :)

ubuntu-gnome/daily-live: yakkety-desktop-amd64.iso oversized by 173490176 bytes (1247232000)
ubuntu-gnome/daily-live: yakkety-desktop-i386.iso oversized by 206749696 bytes (1280491520)

Thanks,
-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                    http://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org

> On 02/05/16 10:35, Steve Langasek wrote:
> > Hi folks,
> >
> > It's been several years now since the last time the Ubuntu desktop fit on a
> > CD and we raised the limit for oversized images.  However, while we had a
> > roadmap for a few cycles for how to raise the limit gradually to keep
> > healthy pressure in place, we've gone past the end of that and daily images
> > have been reporting as "oversized" for quite a while now.
> >
> > This generates daily emails to members of the release team and cdimage team,
> > which then basically are seeing no follow-up because we know nobody cares
> > about these limits but no one has set new ones.
> >
> > I've finally gone ahead and bumped the limit on Ubuntu desktop images,
> > shortly before xenial release, to 2GB for a minimally-sized USB stick; this
> > gives us a new limit that I think we will care about, while also leaving us
> > headroom so we're not constantly fighting it back down to the line (current
> > images are ~1.4GB).
> >
> > But Ubuntu Desktop is not the only image that's oversized according to the
> > stated limits - there are lots of others (see attached mail).  As all of
> > these images have been released with 16.04, it's clear that these limits
> > aren't important to the owners of those products either.
> >
> > Can I ask flavor leads to please reply to this email and answer two
> > questions:
> >
> >   - What should the size limit be for your images, for 16.04 and later?
> >   - Do you want to be subscribed to the email notifications of oversized
> >     images - and if so, what address?
> >
> > For maintainability purposes, it would be helpful if we didn't have too many
> > different per-flavor image limits.  I'd recommend using one of the limits
> > already present in our checks:
> >
> >   850MB
> >   950MB
> >   1GiB (not GB - technically this means it doesn't fit on a 1GB USB stick,
> >     but who has 1GB USB sticks anymore?)
> >   1224MiB (? should probably be made 1.2GiB...)
> >   1.46GB (mini DVD)
> >   2GB (== 2GB USB stick)
> >   DVD (4590208KiB)
> >
> > OTOH those are some pretty big jumps in between, so if a flavor wanted to
> > scale in, say, 100MB or 200MB increments, that would probably be ok... but
> > please, let's not keep mixing MiB and MB everywhere :)
> >
> > Thanks,
> >
> >
> 
> 
> -- 
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