From owner-freebsd-questions@FreeBSD.ORG Tue Nov 18 16:10:42 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 7EAA3EF1 for ; Tue, 18 Nov 2014 16:10:42 +0000 (UTC) Received: from mail-ee0-x22d.google.com (mail-ee0-x22d.google.com [IPv6:2a00:1450:4013:c00::22d]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0BDD1B25 for ; Tue, 18 Nov 2014 16:10:42 +0000 (UTC) Received: by mail-ee0-f45.google.com with SMTP id e49so144554eek.32 for ; Tue, 18 Nov 2014 08:10:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=biq9492QHHNsyqP2ziNkC7OTp7hK7ZsGxPYc95IZyxU=; b=Qma180fIPvMwgrGqTNZ7WSkvBKxkLoZJWRqa59l8fw19T3M/ts0CvVUdGVywygZJBH VPnYFuMmRMWTv81wj/i8YFOVAqj8vTZQxAIKpGeTCqUVzvLSmLKNHd+cLZPfcQU41f8H Z0EYfBTppMhQIcH3EY2T1vtrjPZFippj7e88eGLzPsF2cm1y49/rT37UbSXRfqzclGTp I2km25MuYDGOqcfLO+FZmfKQn+prGP0p7tSLUwu6rgJ3lSv5pYRp+cu+SDdnGLdtnsRs 87TENXILQqrl00TET9cDlu260xKmR8LN+i+lz0GDeYn10Da5VtEN9PWewdoDDO8QI8D5 TmZA== X-Received: by 10.194.246.167 with SMTP id xx7mr20729769wjc.118.1416327040125; Tue, 18 Nov 2014 08:10:40 -0800 (PST) Received: from t510.bsoft-company.ro (remote.ezwim.com. [193.239.202.173]) by mx.google.com with ESMTPSA id kn5sm48850911wjb.48.2014.11.18.08.10.39 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Nov 2014 08:10:39 -0800 (PST) Message-ID: <546B6F7F.2010902@gmail.com> Date: Tue, 18 Nov 2014 17:10:39 +0100 From: Andrei Brezan User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Arthur Chance , Liste FreeBSD Subject: Re: Hardware RAID or software for ZFS References: <7F1B1DC4-46CA-4B96-836B-2D2D494F60E8@todoo.biz> <546B6D72.3060105@qeng-ho.org> In-Reply-To: <546B6D72.3060105@qeng-ho.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Nov 2014 16:10:42 -0000 On 11/18/14 17:01, Arthur Chance wrote: > On 18/11/2014 15:28, bsd@todoo.biz wrote: >> Hi, >> >> >> I would need your help in order to figure out which will be the best > > in order to setup a server which will be used as a Poudriere server. >> >> My question is related to the usage of hardware RAID controller (JBOD) > > or software based controller (graid) >> >> Server we are targeting is a SuperMicro 1018R-WC0R - 1U >> >> I used to build my server using an HBA such as LSI SAS 9207-8i or LSI > > SAS 9201-16i Then I’ll configure the HBA as JBOD so that disks can be > > presented correctly to the system so that we can build our ZFS FS on > > top of that. >> >> >> My sysadmin suggested me to get rid of the HBA and use direct > > connectivity and Graid. >> >> >> I would like to have some feedback on various aspects : >> >> 1. performance >> 2. usability >> 3. problem one might have encountered > > If you're intending to use ZFS don't use JBOD or graid, just tell > zpool to create a pool out of individual disks using raidz (or > raidz[23] if you have enough disks). > > As for your hardware choice, I'll let others with more experience than > me answer. > JBOD is presenting the disk directly to the OS so it is well suited for a ZFS setup. There are still raid controllers that have both raid capabilities and JBOD although some manufacturers try really hard to separate them for $ome reason. Most of the times you can re-write the firmware on such a device and have either raid capabilities or JBOD.