From nobody Wed Feb 2 23:29:46 2022 X-Original-To: doc@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 3235C19B2123 for ; Wed, 2 Feb 2022 23:29:47 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Jpygt5ZQgz3rSM for ; Wed, 2 Feb 2022 23:29:46 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 93946512F for ; Wed, 2 Feb 2022 23:29:46 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 212NTkFv010854 for ; Wed, 2 Feb 2022 23:29:46 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 212NTkWM010853 for doc@FreeBSD.org; Wed, 2 Feb 2022 23:29:46 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: doc@FreeBSD.org Subject: [Bug 261212] Update the ZFS chapter (20) of the FreeBSD Handbook, and other OpenZFS-related pages Date: Wed, 02 Feb 2022 23:29:46 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Documentation X-Bugzilla-Component: Documentation X-Bugzilla-Version: Latest X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: grahamperrin@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: doc@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: short_desc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Documentation project List-Archive: https://lists.freebsd.org/archives/freebsd-doc List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-doc@freebsd.org MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1643844586; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RGlzDSmH2MkfQYXvovpyfcLVyz4KH+tJn/a/sssNX9k=; b=mYhqC1UtyLfx3cU4x/fL5Dnv3B1yUkvn4G0IwIcuU+xO+XSgI2rwIFpm+meVJ3ukRldpgO NzqeBl1mfEYZXIVDyuPpEInLLlBATtcXTmi3tFI/G5dzJ+XeQdTfwej+9h3oNSZuytOaRg mjevmJ24unYCi3a8lKptsyktiMWgTASpayaSxmH3dSNHF71To8Xni3wwRN8/bbbM84pmzN HD3ArQXdAk8wTL62CqnY0ClsrBuhxE9E8R1Peczt6Dbefqzri9YZRJoDKg0Pbo9hHQYrzt hGWm84AJdSauvfeCzi9dszivrAxxyO1Yu94mjWVyJGp3jFgi9fzxw8HctuVkcA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1643844586; a=rsa-sha256; cv=none; b=qH40/wQcjDNL8UsKMbxHK6svVU3SKf9SBcVnlWNS2WosERt4vRwOCnV5FaG11P6Bj9CckO ssZEfEBwGXJJT/VJaZyivKYTfGYp2szt0qYlCvK8FS7RbpzFTsxyax9BYjQXMuDU5VZHT2 WAGsK+QmJpcc4vurPhetfWjcnpDMp4vB8l2XogGdMTEuRvC02k/OT6jzT7kJzEGESxkH7u EfKEJv/I+mUjuo6USoCj1G7dVXlogwIdGXdYpMRM3QjPlE0sbFJ50gv6q6BB1K2ivWJD/P AkQC4L8mYbMhLiwCQHss6ykbznjIc9HiU/Wml6uaXLPpbfLISE11JAX5kTGpOg== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D261212 Graham Perrin changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|Update the ZFS chapter (20) |Update the ZFS chapter (20) |of the FreeBSD Handbook |of the FreeBSD Handbook, | |and other OpenZFS-related | |pages --- Comment #1 from Graham Perrin --- Not the FreeBSD Handbook alone =E2=80=A6=20 Manual pages =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =20 * finds nothing for zfs(4) in FreeBSD 13.0.=20 Compare with OpenZFS :=20 > zfs =E2=80=94 tuning of the ZFS kernel module For zfs(4) in ports =E2=80=93 more specifically, in 'FreeBSD Ports 13.0' =E2=80=93 we have, for example:=20 > zfs_arc_max=3D0B (ulong) There's a corresponding entry in the OpenZFS page for zfs(4).=20 Actual tunables =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D FreeBSD 13.0-RELEASE includes this variable:=20 vfs.zfs.arc.max =E2=80=93 the value of which defaults to:=20 0 The name of the variable in FreeBSD is comparable to the name of the parameter/variable in original OpenZFS documentation. Fair enough.=20 FreeBSD Handbook =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D describes this variable, with a different name, which probably predates Ope= nZFS in FreeBSD:=20 vfs.zfs.arc_max No mention of 0 and there's this:=20 > =E2=80=A6 all RAM but 1 GB, or 5/8 of all RAM, whichever is more.=20 > Use a lower value if =E2=80=A6 The word "but" is not ideal ("minus" would be better); and the reader might wonder:=20 Lower than what? --=20 You are receiving this mail because: You are the assignee for the bug.=