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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN X-Migadu-Country: US ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1639608916; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post:dkim-signature; bh=vXLzWLffYtSKnUIQ4+0gtR5sJIhEJUtjcoPUtRgifQI=; b=M4PT85UOH1abufNvj/d5FB5P59VqywTG4VSRcmHPaTFsGvDfttRh5trPkVKljc41I6cQDE dLHvz+foDue603Re5eGJJGXNK9hyRCeAJpiw7pSbmrSJtrxZBy9OeNI7biz3iD5+CqVSC6 /X7kW8LydW/wHlMqD5CihnNMlb0oyT9S93kKez3i0IKLt+PzV6xH5uyOwLuTFm/WFznGGk leKLL2Aj9crsTvWJSeuF+aX8ggIYMK/SqdU6kqozCmBW++x3/AFgbdRBwVlqZ+ikKW4+Mi E68Yrn9S8SDRiiD8udtDhhNQ//Pi2/gws+GE3z59gR+Kvf5/eDKTbF1XBunbAw== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1639608916; a=rsa-sha256; cv=none; b=RwM+x4cz+Sf6NLXmi2LWniKkCtpHwGOagvjfBu1QrF5mpQyF4G8XDWwaFYFqh1fc3KujzC SCQX8/2mPAi6Vauw7mRFA/KT03+zgZvIvuyBqqVQHGLOE0jYwbMGO+GU+4XENNQ5EnZoGN jg4p3zfOUAr/pOYjegNrzCpu7snJlpr5AuXemqF4VsnvCzQBM/xWfE/WRa4NuG0TTqaJKJ BNDHwnyw1JhQgb8lzckpKrYctNtGF/eNcWukqGm96d86UxmuGq5swkWttF1DxBeXR6igRn RLEVL9Qo9Ra88NYXkh8VhaSf2wDF2BpcSRyyvmNUsz6P9N+hMaGIJM3+D1w+BQ== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=V10Av3zD; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -7.68 Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=V10Av3zD; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: 40C262E9E5 X-Spam-Score: -7.68 X-Migadu-Scanner: scn0.migadu.com X-TUID: bOilOT1rd3Ju Hi Chris, Thanks for the update. And for the all work. :-) On Wed, 15 Dec 2021 at 16:48, Christopher Baines wrote: > In summary, the space issue I mentioned in the previous update has > effectively been addressed. All the paused agents are now unpaused and > builds are happening again. The timing had almost been perfect. ;-) Well, as discussed on Sept., one concern I have is about =E2=80=9Clong-term storage=E2=80=9D =E2=80=93 where long-term is not well-defined and storage = either. Do you think that Bordeaux could run ? Having a redundancy about all origins would avoid breakage. For instance, because Berlin was down yesterday morning, =E2=80=9Cguix pull=E2= =80=9D was broken because the missing =E2=80=99datefuge=E2=80=99 package =E2=80=93 dis= appeared upstream. Today, Guix is well covered for package using =E2=80=99git-fetch=E2=80=99 b= ut not for all the others methods. The situation is improving to have a complete fallback using Software Heritage via Disarchive. Not ready yet [1]. :-) This redundancy about all sources appears to me vitally important. Because if Berlin is totally lost for whatever reason, it is game over for preserving Guix =E2=80=93 well, recover from scattered with people=E2= =80=99s store. Other said, in term of capacity and priority, it appears to me worse if 0.01% source (or even just one) is missing than if some substitutes are missing. Because I can always locally burn some CPU, but I cannot create source code. :-) 1: > In addition to lakefront, I've also added a 6TB hard drive to hatysa, > the HoneyComb LX2 machine that I host. Like lakefront, it's busy > downloading the nars from bayfront. This will act as a backup in case > lakefront is lost. Cool! Thanks. > In general this is an important step in being more flexible where the > nars are stored. There's still a reliance on storing pretty much all the > nars on a single machine, but which machine has this role is more > flexible now. I think this architecture also makes it easier to break > the "all nars on a single machine" restriction in the future as well. IIUC the design, if the proxy server is lost, then it is easy to replace it. Right? I remember discussions about CDN [2,3,4,5,6]. I do not know if it solves the issue but from my understanding, it will improve at least performance delivery. Well, it appears to me worth to give a try. 2: 3: 4: 5: 6: > Going forward, it would be good to have an additional full backup of the > nars that bayfront can serve things from, to provide more > redundancy. I'm hoping the nar-herder will also enable setting up > geographically distributed mirrors, which will hopefully improve > redundancy further, and maybe performance of fetching nars too. To me, one first general question about backup coordination is to define a window for time: - source: forever until the complete fallback to SWH is robust; - all the substitutes to run =E2=80=9Cguix time-machine --commit=3D<> -- h= elp =E2=80=9D for any commit reachable by inferior: forever; - package substitute: rule something. Thanks for taking care about redundancy and reliance of CI. Cheers, simon