From owner-freebsd-arch@freebsd.org Thu Jan 23 04:05:33 2020 Return-Path: Delivered-To: freebsd-arch@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 9AA7722AFF7 for ; Thu, 23 Jan 2020 04:05:33 +0000 (UTC) (envelope-from woodsb02@gmail.com) Received: from mail-vk1-xa35.google.com (mail-vk1-xa35.google.com [IPv6:2607:f8b0:4864:20::a35]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4837wX3n61z40r2 for ; Thu, 23 Jan 2020 04:05:32 +0000 (UTC) (envelope-from woodsb02@gmail.com) Received: by mail-vk1-xa35.google.com with SMTP id o187so617856vka.2 for ; Wed, 22 Jan 2020 20:05:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Ae3EiHzqfa407O+0LPZ/+zeVEN/SZP6GT61ySZfEB8A=; b=Rltf6o1QjTr6sfbsoCwwI4EpJdMlcQCQAi1llQxg5rZBsAv4hRSUj108MtEEaSTZVH liqDg5YYM2D+YiJQpO8eyb1BGS3iMMJDOdiEOEEwITc2FxNEW86OfCxtB4aZIHClDV0p A8hImsNPf5WZg9Ur7/+lGertrYjrZaAZMW2E/8Qt4cpN3G0XGa9RIp9PukTDB8NvyK/7 +VeEJoucqmHnZlSBT5Wixs9+I2x9Tax2OD+sto4OmELe9qIGd2XZurV8S31b02pi7aMi bKdPnj5a7ozunygyX5Tll9vMTXXxPhKxNwpLljse++vblC7WhZt9+wwy7gUbehk4kihI q0aQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Ae3EiHzqfa407O+0LPZ/+zeVEN/SZP6GT61ySZfEB8A=; b=UMypVfhRkC7917OG3hzeYIhriH9ZFWDyrz5WJZTcxLK71kMBSOzWUQga7bv2k8JQZT 3wOZ4F+i7L+Lm+yQsIPWFcl8kaoX6pQn+YSbK69p4L1AdgWRpQ9JDpXIX22u0UcIsUV1 e+MFtwAXIqNvuKQxRiHkgCN9zroKHJkjm5c6IQ65BPV0FM9sZw0LVrhUDLJ9ea2fjOIN eXvUkQtAP+R38WVa/ivOcXi9qpMwabbRoIlEe6iOGBX/jCC+sstOhSHva4gdowr8f1Nc qwXPWU3oVb6/qTv0eCejoTzzlocmtPuP+hf2k0I1R8ZKqzu7PcoJVWAf0+8UloqQ+vMD Ifrg== X-Gm-Message-State: APjAAAUhgmoYgEeN7+YhxHhxlYsHwgBANhR90bjuKz4Y+LeDQXWkCHIl SXXOvhDKwSSbPliPze0IYcHvCYLP10l3Lc50WPE= X-Google-Smtp-Source: APXvYqzf0ndRMFNyu2JwkJ+luHfN9/2+VWZeiNFfrlt+Fl/wJQaZGV69RJ2ovC3q9idfwNzcjkBC3v4BGnki2Mxa08c= X-Received: by 2002:a05:6122:11a6:: with SMTP id y6mr8925221vkn.32.1579752330542; Wed, 22 Jan 2020 20:05:30 -0800 (PST) MIME-Version: 1.0 References: <6C674E9A-5946-4424-AEA1-689D2DA3C256.ref@yahoo.com> <6C674E9A-5946-4424-AEA1-689D2DA3C256@yahoo.com> In-Reply-To: <6C674E9A-5946-4424-AEA1-689D2DA3C256@yahoo.com> From: Ben Woods Date: Thu, 23 Jan 2020 12:05:19 +0800 Message-ID: Subject: Re: svn commit: r356758 - in head/usr.sbin/bsdinstall: . scripts To: Mark Millard Cc: freebsd-arch X-Rspamd-Queue-Id: 4837wX3n61z40r2 X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=Rltf6o1Q; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of woodsb02@gmail.com designates 2607:f8b0:4864:20::a35 as permitted sender) smtp.mailfrom=woodsb02@gmail.com X-Spamd-Result: default: False [-2.00 / 15.00]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; URI_COUNT_ODD(1.00)[9]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; FREEMAIL_TO(0.00)[yahoo.com]; FROM_EQ_ENVFROM(0.00)[]; IP_SCORE(0.00)[ip: (-9.63), ipnet: 2607:f8b0::/32(-2.07), asn: 15169(-1.82), country: US(-0.05)]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-arch@freebsd.org]; IP_SCORE_FREEMAIL(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[5.3.a.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Jan 2020 04:05:33 -0000 On Thu, 23 Jan 2020 at 8:58 am, Mark Millard wrote: > Ben Woods woodsb02 at gmail.com write on > Thu Jan 23 00:07:13 UTC 2020 : > > > Before I commit phabricator review D23224, is there any final comments? > > > > Particularly on these 2 lines of help-text: > > msg_partitioning_zfs_help=3D"ZFS is recommended if you have at least 4G= B > RAM" > > msg_partitioning_ufs_help=3D"UFS is recommended if you have less than 4= GB > of > > RAM" > > > > There is some disagree about what these 2 recommendations should be. > > > > 4GB was recommended by: imp, emaste, philip, eugen, dteske > > 8GB was recommended by: mike > > 16GB was recommended by: cem > > > > The 4GB limit seems to have the best consensus, however there was some > > debate about whether ZFS is recommended on a system with 4GB, or only > > systems with MORE THAN 4GB. > > What of uSD card based systems (for example small ARM boards)? > Does the typical performance characteristics of the uSD cards > (such as large latencies) have ZFS consequences to avoid? The ZFS install option is only presented on amd64, i386, arm64 systems. https://github.com/freebsd/freebsd/blob/e8ec070d82b84afb3817e1bc76b4eeebfdb= 6ce0f/usr.sbin/bsdinstall/scripts/auto#L291 I suspect most small arm boards are still typically 32bit arm? However, that doesn=E2=80=99t preclude there being small arm64 boards (now or in the future...). More > generally: is there anything besides RAM that has enough use but > also has good reason to contribute to a potential choice to > avoid ZFS? (I've no clue of uSD card use makes a good example or > not, but I wanted something to illustrate the general question.) Perhaps the help text should instead include a link to the ZFS tuning guide that includes any and all considerations? I do like the choice to just add some quick notes to read > instead of detecting and adjusting defaults. > > [This may not make it to freebsd-arch: it is historically rare > that I'd comment there and so I've not tried to be added. > Anything I submit there goes through a moderator and I've > never objected when one of those rare ones did not go > through.] > > > As for the ZFS auto-tuning, I see that as being a separate discussion > > (which could ultimately change this recommendation, but shouldn't preve= nt > > us from committing this help text now). > > > > =3D=3D=3D > Mark Millard > marklmi at yahoo.com > ( dsl-only.net went > away in early 2018-Mar) Cheers, Ben > -- -- From: Benjamin Woods woodsb02@gmail.com