From: Chris Marusich <cmmarusich@gmail.com>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: guix-devel@gnu.org
Subject: Re: 'guix build' and garbage collection
Date: Thu, 06 Apr 2017 20:47:06 -0700 [thread overview]
Message-ID: <87inmgg9qd.fsf@gmail.com> (raw)
In-Reply-To: <877f30tlph.fsf@gnu.org> ("Ludovic \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\= \=\?utf-8\?Q\?s\?\= message of "Tue, 04 Apr 2017 14:13:14 +0200")
[-- Attachment #1: Type: text/plain, Size: 1126 bytes --]
ludo@gnu.org (Ludovic Courtès) writes:
> Hi!
>
> Chris Marusich <cmmarusich@gmail.com> skribis:
>
>> Do you know why the intensional model hasn't been deployed in the 11
>> years since the thesis was published? To learn more, I can think of a
>> few places to look (Nix email lists, other Nix-related research papers),
>> but if you have specific recommendations, it would be helpful!
>
> The intensional model (content-address item) works well if and only if
> packages are 100% bit-reproducible, which they are not (yet!).
>
> Also I’m not sure how substitutes could work with this model since one
> cannot refer to the build result until it’s available.
FYI, section 6.4.4 (p. 157) of Eelco's thesis describes how substitution
works in the intensional model. When performing substitution for a
store path p, if a trusted substitute for p has been registered, then it
is tried, and the substitution is considered successful if and only if
the output's content-addressed store path equals p.
If I learn more about why Nix doesn't use the intensional model, I'll
let you know.
--
Chris
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 832 bytes --]
next prev parent reply other threads:[~2017-04-07 3:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-02 1:06 'guix build' and garbage collection Chris Marusich
2017-04-02 9:30 ` Ludovic Courtès
2017-04-03 6:40 ` Chris Marusich
2017-04-03 8:53 ` Ludovic Courtès
2017-04-03 16:29 ` Chris Marusich
2017-04-04 12:13 ` Ludovic Courtès
2017-04-07 3:47 ` Chris Marusich [this message]
2017-04-07 19:53 ` Ludovic Courtès
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://guix.gnu.org/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87inmgg9qd.fsf@gmail.com \
--to=cmmarusich@gmail.com \
--cc=guix-devel@gnu.org \
--cc=ludo@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/guix.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).