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06 Apr 2021 09:18:51 +0200 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= To: Paul Garlick Cc: guix-science@gnu.org Subject: Re: reproducibility of numerical experiments References: <1cb914b16ee0dad6bf5102bb4b66fda3b020dbec.camel@tourbillion-technology.com> <87mtug203e.fsf@gnu.org> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 17 Germinal an 229 de la =?utf-8?Q?R=C3=A9volution?= X-PGP-Key-ID: 0x090B11993D9AEBB5 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5 X-OS: x86_64-pc-linux-gnu Date: Tue, 06 Apr 2021 09:18:50 +0200 In-Reply-To: (Paul Garlick's message of "Sat, 03 Apr 2021 15:36:40 +0100") Message-ID: <87pmz7q3s5.fsf@inria.fr> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=192.134.164.83; envelope-from=ludovic.courtes@inria.fr; helo=mail2-relais-roc.national.inria.fr X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guix-science@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-science-bounces+larch=yhetil.org@gnu.org Sender: "Guix-Science" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; 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aspmx1.migadu.com; dkim=none; spf=pass (aspmx1.migadu.com: domain of guix-science-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-science-bounces@gnu.org X-Migadu-Spam-Score: -0.94 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=none; spf=pass (aspmx1.migadu.com: domain of guix-science-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-science-bounces@gnu.org X-Migadu-Queue-Id: 7250B15DE6 X-Spam-Score: -0.94 X-Migadu-Scanner: scn0.migadu.com X-TUID: 4e9rC6zWeaXm Hi Paul, Paul Garlick skribis: > There were two questions on the day: > > i) Q: what happens if a repository disappears? Is the environment > still reproducible? > A: Yes. The Software Heritage Project provides a backup of all Guix > packages. This is automatically used as a fallback, if needed. > > ii) Q: Suppose I am an end user who wishes to include some third-party > python package, do I require it to exist as a Guix package to be able > to have the "exact" reproducibility you described? > A: There is a useful feature that allows a local channel to be > defined. One can keep extra packages and one=E2=80=99s own solvers in the > local channel. These are not visible in the main Guix repository but > have all the same features regarding reproducibility. OK. >> Is the FenICS community generally aware of reproducible deployment >> issues? > > Yes, reproducible deployment is seen as desirable, though difficult to > achieve with the currently-used tools. Typically model development > starts on a local workstation and is scaled-up to an HPC system when > needed. Tools such as singularity are often used. However, the local > and remote installations may differ and as a consequence applications > that run on the local system may not run on the remote system. > >> It=E2=80=99s great to reach out to the numerical simulation community. >> Reproducible deployment and numerical simulation are two links in the >> long chain of reproducible science that we have to connect. > > Sure. My view is that Guix provides the machinery to transform what > can be a stop-start mode of numerical model development to something > that is more sustainable over time. Interesting, thank you! Ludo=E2=80=99.