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Mon, 24 Oct 2022 14:29:02 -0400 Received: from debbugs.gnu.org ([209.51.188.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1on2C6-0000EY-LM for bug-guix@gnu.org; Mon, 24 Oct 2022 14:29:02 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1on2C6-0006Qw-2d for bug-guix@gnu.org; Mon, 24 Oct 2022 14:29:02 -0400 X-Loop: help-debbugs@gnu.org Subject: bug#58760: Guix System iso too big for cdrom again Resent-From: Tobias Geerinckx-Rice Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Mon, 24 Oct 2022 18:29:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 58760 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: "pelzflorian (Florian Pelz)" Cc: 58760@debbugs.gnu.org X-Debbugs-Original-Cc: bug-guix@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.166663609024668 (code B ref -1); Mon, 24 Oct 2022 18:29:02 +0000 Received: (at submit) by debbugs.gnu.org; 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aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=tobias.gr header.s=2018 header.b=VqdT3FOd; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -4.00 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=tobias.gr header.s=2018 header.b=VqdT3FOd; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: 43D3617AAA X-Spam-Score: -4.00 X-Migadu-Scanner: scn0.migadu.com X-TUID: dl3C/TrWgLtj --=-=-= Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Heyo, pelzflorian (Florian Pelz) =E5=86=99=E9=81=93=EF=BC=9A > From what Tobias (Cc) wrote, he used the highest > compression settings. > > So it seems nothing can be done to make the install iso smaller Well=E2=80=A6 I used the highest compression setting *for zisofs*. Zisofs is an ancient (and non-standard :-) little hack that Linux=20 supports, and it just happened to be enabled on our kernels=20 already. Plus it's fully transparent to the operating system.=20 That's why I wrote that quick little patch: it was an amusing=E2=80=94to=20 me=E2=80=94way to shrink our ISO basically for free. We're the only distro that I've ever seen use it. But we can go deeper if we choose to, by dropping zisofs and going=20 for something like squashfs, which achieves higher compression=20 through higher block sizes and better algorithms like XZ. This is what other distributions with a compressed root file=20 system do. However, it's marginally more work as you have to loop-mount the=20 image early during boot, and it doesn't involve obscure kernel=20 arcana (boo), and CDs are even more obsolete than they were when I=20 wrote that patch (yay), so don't wait for me to do it. Kind regards, T G-R --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iIMEARYKACsWIQT12iAyS4c9C3o4dnINsP+IT1VteQUCY1bZLA0cbWVAdG9iaWFz LmdyAAoJEA2w/4hPVW15ZHQBAI+nccnuJ4hFRG4Gmpaj/3GJ1dBptGVivk6BRGn7 JwOnAP9yk02pJJ7GcX1XeWlEhDkmvOVolYsuUCh7qz1ZLyNNCg== =zFNo -----END PGP SIGNATURE----- --=-=-=--