From owner-freebsd-fs@freebsd.org Fri Aug 28 22:03:22 2020 Return-Path: Delivered-To: freebsd-fs@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 2063B3C37E2 for ; Fri, 28 Aug 2020 22:03:22 +0000 (UTC) (envelope-from mason@blisses.org) Received: from phlegethon.blisses.org (phlegethon.blisses.org [50.56.97.101]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4BdYWX52vzz4VqR for ; Fri, 28 Aug 2020 22:03:20 +0000 (UTC) (envelope-from mason@blisses.org) Received: from cocytus.blisses.org (service.blisses.org [64.223.129.151]) by phlegethon.blisses.org (Postfix) with ESMTP id 2143D194D03 for ; Fri, 28 Aug 2020 18:03:14 -0400 (EDT) Received: from blisses.org (acheron.int.blisses.org [10.0.1.10]) by cocytus.blisses.org (Postfix) with ESMTPSA id BDC5EA1 for ; Fri, 28 Aug 2020 18:03:13 -0400 (EDT) Date: Fri, 28 Aug 2020 18:03:12 -0400 From: Mason Loring Bliss To: freebsd-fs@freebsd.org Subject: Maildir on ZFS Message-ID: <20200828220312.GD6456@blisses.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="FFoLq8A0u+X9iRU8" Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) X-Rspamd-Queue-Id: 4BdYWX52vzz4VqR X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of mason@blisses.org designates 50.56.97.101 as permitted sender) smtp.mailfrom=mason@blisses.org X-Spamd-Result: default: False [-4.88 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-fs@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-0.97)[-0.967]; RCVD_COUNT_THREE(0.00)[3]; DMARC_NA(0.00)[blisses.org]; NEURAL_HAM_SHORT(-0.53)[-0.526]; NEURAL_HAM_MEDIUM(-0.98)[-0.985]; SIGNED_PGP(-2.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; ASN(0.00)[asn:19994, ipnet:50.56.0.0/17, country:US]; RCVD_TLS_LAST(0.00)[]; MAILMAN_DEST(0.00)[freebsd-fs] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Aug 2020 22:03:22 -0000 --FFoLq8A0u+X9iRU8 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable I sent this to BSD Now a month ago and haven't heard anything back, but I bet there are opinions to be had in here! Thanks in advance. I'm migrating a mail server to a FreeBSD jail, and I've seen conflicting notes about how best to tune ZFS for holding accounts with Maildirs. My current thinking is that I don't want to change recordsize as it's an upper limit, not a minimum, but that I might want to set primarycache=3Dmetadata = so I'm caching information about Maildir contents, but not the Maildir contents themselves. But are these valid thoughts, and what else is there to think about? The problem is that I don't know what I don't know, and I'm not sure about what I do know, so I'd love some advise about how best to tune a dataset for Maildirs. Thanks! --=20 Mason Loring Bliss (( If I have not seen as far as others, it is because mason@blisses.org )) giants were standing on my shoulders. - Hal Abels= on --FFoLq8A0u+X9iRU8 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEEXtBZz1axB5rEDCEnrJXcHbvJVUFAl9Jfx8ACgkQnrJXcHbv JVW+Jg//SRPWBIAwPzw86nEBdqECfqkp/bnErnkZyADlRNt/+A7MPliXo5hN5N9E IOjytjbrQrgzNfnMQawnUAbVtzv8ytrqfIB6DPAOUaegU9lhBZ1UE00lPNmEnLu3 7kHGMCgWZQyR2+91q8N/N1L+q9cEiOeQpt+1SlBHvYP0LEaRxhvS2pliXxjge3kh MLiU4J4Tn6Xc62t2tCiV7jIYDLQAmQgDi1zo2L6CPKw5nhQYUm0wBYG3l5Cafxws 8ya3lZszQ910X6VOVs+FUYDDAUA0dOPW6kDBGD/IxwZKhNagBKoD1sasfr87j/jU xG8JJTI/X0O/LJbVAeXj8zuRpawASEYSzkDRrr//CuOlvP1C9SGMhon7N1gRBb3I ralwvbU5O86huhZGXSvx9OcvkRnjTEWXUNbEOE8K1a0lWTMVHyUgcD+XjUmZCtau cihllASrV5I0MwzFvghE2XwvDCzZkEth4qTQtg9frGg3zNMPjeyybKwuqqnp7lDx cofTyplx6Cd8wg3xmXgMFwO1At2WORk0XWxBHOV/aYir+wQOlRRzvR+2Lg0dO0Zo 90ieJpMARYbYJ5uXGQPBZnOzt4a4sNhYud5qPUnjtj+867NmRtR9tLjqpqnXlUQh 9rwWFwmUiRZMosRaZ/fkZ9WnnqvZ7AsJj8strp1VF24ZvQZhSgY= =jrcF -----END PGP SIGNATURE----- --FFoLq8A0u+X9iRU8--