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Re: Can general compute and packaging be more formally merged into a sin

From: zimoun
Subject: Re: Can general compute and packaging be more formally merged into a single case?
Date: Tue, 3 Dec 2019 22:21:58 +0100

Hi Josh

On Tue, 3 Dec 2019 at 18:34, Josh Marshall
<address@hidden> wrote:
> At the airport, thinking on the fundamental differences between gwl and
> guix.  It seems like these can be articulated as the same case when
> considering a tracked and linked compute history.

On address@hidden, from my understanding, we are discussing that
and it seems related to the Content Addressable Store (CAS).

Otherwise, about the differences between GWL and Guix, you can dig in
some archeology; especially read the initial proposal by Roel and the
comments by Ludo. (I think I already pointed to you where the related
messages live.)

> How I see this, when packaging you take checksums off of inputs not for
> your own assurance that they are correct (though you could) but to ensure
> that under different circumstances another user can be sure that they have
> the right starting points.  Then as a matter of storing results and
> ensuring the integrity of our results for later we take more checksums.
> What we can do is to create a unit computational step of sorts whereby a
> user enters a monitored shell whereby they install packages, perform their
> work, and produce changes which can be taken to be outputs.

This already works in GWL. :-)

>All downloads,
> uploads, and files changes tracked.

To me, it is not clear how GWL should track this because they can be
really huge.

> Then perform a basic minimization
> algorithm to reduce the inputs so long as the outputs do not differ.

Which kind of minimization algorithm do you have in mind?

> This
> optimized unit computational step can then be tracked with the input
> checksums and outputs.  This merges general compute and packaging, then
> adding compute power only needs to scale here.
> From these, computational chains may also be produced to know a full graph
> of what is happening.  Thoughts?

It is already the case. If I understand well.

All the best,

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