From owner-freebsd-fs@FreeBSD.ORG Thu Oct 10 20:21:23 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 250CC570 for ; Thu, 10 Oct 2013 20:21:23 +0000 (UTC) (envelope-from berend@pobox.com) Received: from sasl.smtp.pobox.com (a-pb-sasl-quonix.pobox.com [208.72.237.25]) by mx1.freebsd.org (Postfix) with ESMTP id D380C2A41 for ; Thu, 10 Oct 2013 20:21:22 +0000 (UTC) Received: from sasl.smtp.pobox.com (unknown [127.0.0.1]) by a-pb-sasl-quonix.pobox.com (Postfix) with ESMTP id A5322D1E9; Thu, 10 Oct 2013 16:21:14 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=date :message-id:from:to:cc:subject:in-reply-to:references :mime-version:content-type:content-transfer-encoding; s=sasl; bh=hZqhaH4muXBpl94cGODSNWgowtU=; b=QA/Yrwbl/i4cKMsuUXmfRKH1f2bY E3ww+QiPYfoibCugyrmogSyTOH5z8WlFx89xOK/WTnOFH0EwpLZED5znK17uw8a5 wjo9oWfjRXcXKW2ep6dECPPqioY/OUeL76+O47FCOZnkigHUsbFI4snB8gE5NzuA gvbMtHO5EcUWi5E= DomainKey-Signature: a=rsa-sha1; c=nofws; d=pobox.com; h=date:message-id :from:to:cc:subject:in-reply-to:references:mime-version :content-type:content-transfer-encoding; q=dns; s=sasl; b=qk/605 dBWa/x+oCe8Kr8GwxAfTGkbtAYq6k8ryAwY2l49cZpfr+i5NvqLVIV25V76EjIV5 Z1bpM6ZdneGjwRnKE5nrdzbeFLQi56ol6TzaSSkS9JJ7A0dslyn0uRm8PEJm/nu+ 9y8RPs65Uqz/7fbScKPJbb+4fwtdKO2ucS2ZM= Received: from a-pb-sasl-quonix.pobox.com (unknown [127.0.0.1]) by a-pb-sasl-quonix.pobox.com (Postfix) with ESMTP id 9C7A2D1E8; Thu, 10 Oct 2013 16:21:14 -0400 (EDT) Received: from bmach.nederware.nl (unknown [27.252.129.140]) by a-pb-sasl-quonix.pobox.com (Postfix) with ESMTPA id 078A7D1E6; Thu, 10 Oct 2013 16:21:14 -0400 (EDT) Received: from quadrio.nederware.nl (quadrio.nederware.nl [192.168.33.13]) by bmach.nederware.nl (Postfix) with ESMTP id EE0632160C; Fri, 11 Oct 2013 09:21:12 +1300 (NZDT) Received: from quadrio.nederware.nl (quadrio.nederware.nl [127.0.0.1]) by quadrio.nederware.nl (Postfix) with ESMTP id DB87841EA38D; Fri, 11 Oct 2013 09:21:12 +1300 (NZDT) Date: Fri, 11 Oct 2013 09:21:12 +1300 Message-ID: <87hacoubbb.wl%berend@pobox.com> From: Berend de Boer To: john@potato.growveg.org Subject: Re: RAM and zfs and multiple disks In-Reply-To: <20131010170724.GA19751@potato.growveg.org> References: <20131010170724.GA19751@potato.growveg.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 EasyPG/1.0.0 Emacs/24.3 (i686-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) Organization: Xplain Technology Ltd MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: multipart/signed; boundary="pgp-sign-Multipart_Fri_Oct_11_09:21:12_2013-1"; micalg=pgp-sha256; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit X-Pobox-Relay-ID: 82A71322-31E9-11E3-8F19-0A540E5B5709-48001098!a-pb-sasl-quonix.pobox.com Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Oct 2013 20:21:23 -0000 --pgp-sign-Multipart_Fri_Oct_11_09:21:12_2013-1 Content-Type: text/plain; charset=US-ASCII >>>>> "John" == John writes: John> Hello list, I'd like to have zfs on my freebsd John> desktop. However, this motherboard can take 8GB RAM, max. John> I'd like to get 2 x4Tb drives. Realistically, do I need John> another motherboard? The primary reason to have ZFS is to John> guard against bitrot. By default ZFS takes most available memory, as it assumes it's an NFS server. That can be easily tuned, see vfs.zfs.arc_max. The main reason for a lot of memory is dedup. If you don't use it, I would say you have plenty. Note you can enable dedup on selected filesystems for ones where it makes sense. -- All the best, Berend de Boer --pgp-sign-Multipart_Fri_Oct_11_09:21:12_2013-1 Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit Content-Description: OpenPGP Digital Signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (GNU/Linux) iQIcBAABCAAGBQJSVww4AAoJEKOfeD48G3g5gyYP/0UuQbQKLBA0mxQ9hxDIRKhm 3nB00vh3fiYay8NMzEqwLRJvlq4lZXd/HU1vhHjAcoveehajZNB8cqCx/7iFIede WC9qItLddhhPoSyCeGBVLgC6YL3gbuiYyvn72fivCLZ+jAyIkV1upHH5zJUPCrpG zUybmr5kSBKitWTC7EBvB0rVLJQxQ7yvXEpGhkJ8NzpZnzbHTg0d9GfR7qh3WDWK ykkiPlYYtN0J+oZcZW0rcWYTdWeNRdPV1ZwUeBEIh87tvxxOKp6BLGOS4EuG1MrD nOJLBzX3LdLkCWa5QdceTm/0GDvlEgXS43dDTk8hblAaItVx6ZtnJ/3vn0l9rECH Iely+yV3R3QlwzlkkVCOWVNRHDUMIGkDMhd9bL/iJApujCSy4hyk59v7aGxPMe+i qLU0LIwTt7ZCquMMmaHQ17qmd8m0v3e91+uJoec7UHTTMXPik/VV4ED4yT3KMb0a 8/ERoZPZk6dGh2KyBebAfSy005yZGevQag/fs/QfOgR9g6KDWm2yvtWm4OjmVRqD YgIDA7B4JNCWLEeQhj1okgi0yGUZH67LIhGZGd0dHThOpCBCfSVy3+ImJXG20wMf 1RPMTPwyboAsg5m3e7Hw+V+Rl4upnFBqtHYP1Bu1aQiHAWzlmjEZ7gVpsZlOMbYI vV2Z2HFzx7ORqrUAFdPv =hy8s -----END PGP SIGNATURE----- --pgp-sign-Multipart_Fri_Oct_11_09:21:12_2013-1--