On 20 May 2011 17:12, James Westby <james.wes...@linaro.org> wrote:
> On Fri, 20 May 2011 16:03:16 +0100, Peter Maydell <peter.mayd...@linaro.org> 
> wrote:
>> We're only doing this once a month, we should just produce images
>> for everything rather than trying to second guess which we can get
>> away with not generating.
>
> While that's a nice sentiment, we can't ignore the disk space usage that
> this implies.
>
> If we take as an example 6 supported boards, and 6 images (3x2G, 1x1G,
> 1x.5G, 1x.1G), that's ~48G per month, so in one year ~0.5T of images. I
> haven't done the maths to factor in the bandwidth here.
>
> We can only do this if we change our image retention policy. I think
> that the benefit of this change is worth doing that, but we can't
> naïvely start generating all of this without considering these
> questions.

If disk space is a problem then we can take the other approach that
was suggested at UDS, which is that we autogenerate images on the
fly as they are asked for and keep a cache of the most recently
used ones. I thought the reason we opted to do the simple "just
statically generate images for each monthly release" was exactly
that for a monthly thing we thought the disk space usage was
acceptable.

-- PMM

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