From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp1 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id aNpXEP40118vRAAA0tVLHw (envelope-from ) for ; Mon, 14 Dec 2020 09:48:46 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp1 with LMTPS id 0H8hDP4011/2MQAAbx9fmQ (envelope-from ) for ; Mon, 14 Dec 2020 09:48:46 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 08CFF9402C8 for ; Mon, 14 Dec 2020 09:48:46 +0000 (UTC) Received: from localhost ([::1]:60102 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kokTE-0006GD-U4 for larch@yhetil.org; Mon, 14 Dec 2020 04:48:44 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:60400) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kokT6-0006G6-R4 for guix-devel@gnu.org; Mon, 14 Dec 2020 04:48:36 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:49338) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kokT6-0004dn-BD; Mon, 14 Dec 2020 04:48:36 -0500 Received: from [2a01:e0a:1d:7270:af76:b9b:ca24:c465] (port=39766 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kokT5-0001aN-O0; Mon, 14 Dec 2020 04:48:36 -0500 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= To: Ricardo Wurmus Subject: Re: guix pack file enumerator? References: <875z5f6z1a.fsf@elephly.net> <877dpswnxl.fsf@gnu.org> <87a6unnsud.fsf@elephly.net> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 24 Frimaire 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: Mon, 14 Dec 2020 10:48:34 +0100 In-Reply-To: <87a6unnsud.fsf@elephly.net> (Ricardo Wurmus's message of "Wed, 09 Dec 2020 12:04:26 +0100") Message-ID: <87zh2gvhu5.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: guix-devel@gnu.org Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN X-Migadu-Spam-Score: -1.81 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Queue-Id: 08CFF9402C8 X-Spam-Score: -1.81 X-Migadu-Scanner: scn1.migadu.com X-TUID: uEN+zxaglTz2 Hi, Ricardo Wurmus skribis: > I=E2=80=99m unpacking to rsync now, but it=E2=80=99s not great to duplica= te files on the > local disk only to send them over the network. The ideal workflow for > me would treat the store on my local machine as the source and the > remote machine as the target, without any copying from source to source > in between. > > The local-unpack method also requires an empty directory to be > maintained; it needs to be emptied before the next time we try to unpack > anything. > > Another downside is the creation of the tarball itself. I don=E2=80=99t = need it > but it=E2=80=99s still created only to be destroyed in the next step. Th= is is > unfortunate, because Guix could use a different mechanism to =E2=80=9Cche= ck out=E2=80=9D > files from the store to a new location. Here=E2=80=99s another idea: allowing =E2=80=98guix copy=E2=80=99 to talk t= o a =E2=80=9Craw=E2=80=9D remote store=E2=80=94i.e., just /gnu/store + /var/guix/db accessed over SSH. Just like we have (guix store ssh), we could implement raw store operations over SSH using =E2=80=98remote-eval=E2=80=99 and (guix store dat= abase). Hmm that amounts to implementing a subset of the daemon. Ludo=E2=80=99.