From owner-freebsd-arch@freebsd.org Thu Jan 23 00:58:09 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 86D2D223CB5 for ; Thu, 23 Jan 2020 00:58:09 +0000 (UTC) (envelope-from marklmi@yahoo.com) Received: from sonic305-21.consmr.mail.gq1.yahoo.com (sonic305-21.consmr.mail.gq1.yahoo.com [98.137.64.84]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4833mJ1lSkz3HJG for ; Thu, 23 Jan 2020 00:58:07 +0000 (UTC) (envelope-from marklmi@yahoo.com) X-YMail-OSG: 1WtQvOMVM1m4Ehq4uCKRcXXuPMmhQEvUMaKnLpWQWukbE19Y746DoSM8OweWQmG _Cg0TA9NGs73hR2DrbDSRu7X9zx0_4DCU5Y69sp4AcJ0Yd4eibLUes9d3GxkQKW3NaVevG713MxG wS_NgpRoUDt4t4tRiUCjDCOCPSrrtRR9MyT8ZQ1QfeFJYet_7Z_hynkO9_m2LHZ7bQgA4TxSCKFT dX0nI3Hc8gFxxGDS_maUgxUsunYtrzIg6s2u_dZabokWz4gaLo1CWpY24WhbOY2reoP1G5LA2g9m VjxsO0B3xZt8FtRAm2n1KqJXZR6djKA9pTW8g6CIaXq3lwaSZGQbxRxK_sts0prK4TpYr8eGy4cE T.E0EX5Kw.PEFMwFGGYsGOj5SS0awLgTDLJSvpHNuDB0ou1XOcll4wrBD0oospafLe4vHcr7FbnT MYXidmQ.mSmPprudDo3CeA5K7IJG8BLuoOwo4rmhfx718PA7nF2He3NZp2cAHmHO1FMecGlveX91 qPf53CqtBtb4odSTXcW_9GKdbonPmiw8OAOBzH9e.A3aCVvv7ApHZCiw0yt92maukKzK1dgSdbBb Di3Ydg4iJXixO49yQ9yQvjq4oSBg9OaNRvoJLwIWj_4F9zYc2veXbXyWvvsKvf0xyJKpeOjBEwOT BwW2vjDM4_X6bn4IZajNEvZsfIQLtUcMf19YynEd8HeNGh4_mpiOoxaNP9Ih6EX3dKdMjbGfnwJP nuD3x.FkDm.Yf9XekXYQFTjB9nN5j7CpchpGVYmvGdHGq3W59e_Qk9pqVMihgxIWnFuYVRNlUHBk 6teGAR0uAXceDSC_KYHiQYzu5vtcb55Al5kTIyElRBw7dB9nScjJWR9WI6ig_8pBSOljXxMkY6PF SXCBlFBjuXj8zOGjpxiMKhwqKhe4b4XF0VMGx.ITp6wdmeau_D5L8T3QJdcULz4HXG10m0N_Mq.U 8iydApJoCl0TrV1MGmosfT7yfGj56x__gXtfIKYAG0c2YdAvpjXZT51tGI07Irtyb6.HZ962Gkp3 2fFuMxXtLE9UIKLNVbA4bl671yllHjRtnComNHlcglFyOxjnblf9JftufK5ByaufGZAoFtYinYh6 GqXTDjlVxd1tUFuQNqIOnUFQp0Dt9RlUzB3PR0z0DL3i9vmsuT8GpwQi7R.MKz8SYxqpC.Ywz3ES d3Fo5AXAhM6oPaoMEmhS5YdSh39I3fEt6ZRGuoYlO7BQXakAc7Z6ph39YMk6qzDqyntlw6b9DLd8 cAiNnrefeqVFNmLTHr8EmiZDjH13dhPXxBMi_syBoIqbC.aQxAK.d.z4THX.Ye8J0EEaY02RBIB_ UyT.GN9A.tbmYa7czpUP0IUxfPu5V1QTTR_xZ3b89zITwmhNsE_gRa.Ol6HM.VQz8OPQAVQpKk.8 FmUBEWdfrE2PpO5_A6GIkPYOnAyURUA24ONNu.J2NJdwxrYnShjX64DvWD5DsDBwYXzw- Received: from sonic.gate.mail.ne1.yahoo.com by sonic305.consmr.mail.gq1.yahoo.com with HTTP; Thu, 23 Jan 2020 00:58:05 +0000 Received: by smtp415.mail.bf1.yahoo.com (Oath Hermes SMTP Server) with ESMTPA ID 5982548d35b6c5821d977651081cff50; Thu, 23 Jan 2020 00:58:02 +0000 (UTC) From: Mark Millard Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Mac OS X Mail 13.0 \(3608.40.2.2.4\)) Subject: Re: svn commit: r356758 - in head/usr.sbin/bsdinstall: . scripts Message-Id: <6C674E9A-5946-4424-AEA1-689D2DA3C256@yahoo.com> Date: Wed, 22 Jan 2020 16:58:00 -0800 To: Ben Woods , freebsd-arch X-Mailer: Apple Mail (2.3608.40.2.2.4) References: <6C674E9A-5946-4424-AEA1-689D2DA3C256.ref@yahoo.com> X-Rspamd-Queue-Id: 4833mJ1lSkz3HJG X-Spamd-Bar: / X-Spamd-Result: default: False [0.23 / 15.00]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; FREEMAIL_FROM(0.00)[yahoo.com]; MV_CASE(0.50)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[yahoo.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; ASN(0.00)[asn:36647, ipnet:98.137.64.0/21, country:US]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[yahoo.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; FROM_HAS_DN(0.00)[]; MIME_GOOD(-0.10)[text/plain]; IP_SCORE(0.00)[ip: (5.38), ipnet: 98.137.64.0/21(0.85), asn: 36647(0.68), country: US(-0.05)]; NEURAL_SPAM_MEDIUM(0.40)[0.405,0]; IP_SCORE_FREEMAIL(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_LONG(0.32)[0.324,0]; RCVD_IN_DNSWL_NONE(0.00)[84.64.137.98.list.dnswl.org : 127.0.5.0]; RCVD_COUNT_TWO(0.00)[2] X-Mailman-Approved-At: Wed, 29 Jan 2020 20:55:54 +0000 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 00:58:09 -0000 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="ZFS is recommended if you have at least 4GB RAM" > msg_partitioning_ufs_help="UFS is recommended if you have less than 4GB 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? 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.) 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 prevent > us from committing this help text now). === Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)