From owner-freebsd-questions@FreeBSD.ORG Sun May 16 20:30:11 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 53D4B1065675 for ; Sun, 16 May 2010 20:30:11 +0000 (UTC) (envelope-from christias@gmail.com) Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com [209.85.161.54]) by mx1.freebsd.org (Postfix) with ESMTP id D5E8A8FC0A for ; Sun, 16 May 2010 20:30:10 +0000 (UTC) Received: by fxm19 with SMTP id 19so171592fxm.13 for ; Sun, 16 May 2010 13:30:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=IuWVOr5JBgyiJn6IwmbZTv36M5VH3vEF7F3sci8Tu+Q=; b=FqdLRLDQWq0IecwF+ZpY12eb5Sayygnx2GVm4PEWLZHAeDI98McyRCHlH4xXUmAksL WXYkke6MlxhvtrfwPulh++cS7RK/eQSCN/4DzyQQ5wn2sPTkBzpeo/80Et/gO4xW4lW/ g2xfQfl8wiyk0BGohfpLnofhGVYuwvpb9VW4Q= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=RFnDw2CvCHppljR9YYlyaJ56U4uIDRQHSNXoL0Z0NqB+JNUbYue/tHzZpZsBjSdInF uMdQYKBg50NCUs7deuYonYFYpYBwRg5ONXyJ0QBQhMAUdiYi2HUSGqZ61EOby3gigVtm FwkyeHkgv0vraXftIoZ+Q5hBZRi+txukkwQsY= MIME-Version: 1.0 Received: by 10.204.49.211 with SMTP id w19mr118bkf.150.1274040238553; Sun, 16 May 2010 13:03:58 -0700 (PDT) Received: by 10.204.98.211 with HTTP; Sun, 16 May 2010 13:03:58 -0700 (PDT) In-Reply-To: References: Date: Sun, 16 May 2010 23:03:58 +0300 Message-ID: From: Panagiotis Christias To: Paul Mather Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-questions@freebsd.org Subject: Re: Quantum SuperLoader 3 under Bacula on FreeBSD 8 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 16 May 2010 20:30:11 -0000 On Fri, May 14, 2010 at 4:29 AM, Paul Mather wrot= e: > I am currently assembling a quote for an LTO-4 tape backup system. =A0So = far, I am looking at using a 16-slot Quantum SuperLoader 3 with LTO-4HH dri= ve as the tape unit. =A0Married to this will be a server to act as the back= up server that will drive the tape unit using Bacula to manage backups. =A0= The server will be a quad core X3440 system with 4 GB of RAM and four 1 TB = SATA 7200 rpm hard drives in a case that has room for eight hot-swap drives= . =A0I plan on using FreeBSD 8 on the system, using ZFS to raidz the drives= together to provide spool space for Bacula. =A0I will be using an Areca AR= C-1300-4X PCIe SAS card to interface with the tape drive. > > My main question is this: is the Quantum SuperLoader 3 LTO-4 tape drive s= upported by Bacula 5 on FreeBSD? =A0In particular, is the autoloader suppor= ted? =A0The Bacula documentation indicates the SuperLoader works fully unde= r Bacula, though not explicitly whether under FreeBSD. > > The backup server will serve a network cluster of perhaps a dozen machine= s with over 6 TB of storage, most of which is on the cluster's NFS server. = =A0Does anyone have good advice on sizing the spool/holding/disk pool for a= Bacula server? =A0Is it imperative to have enough disk space to hold a ful= l backup, or is it sufficient to have enough space to maintain streaming to= tape? =A0(I don't have much experience of Bacula, having used it only to b= ack up to disk.) =A0In other words, do I need more 1 TB drives in my backup= server? > > Finally, is 4 GB of RAM sufficient for good performance with ZFS? =A0Will= ZFS on FreeBSD be able to maintain full streaming speeds to tape, given th= e various reports of I/O stalls under ZFS reported recently? > > Thanks in advance for any advice or information. Hello Paul, we are using successfully a Quantum Scalar 50 with an expansion box and two F/C FH LTO-4 drives on FreeBSD 7-STABLE and Bacula 5.0.x. FreeBSD 7-STABLE or 8-STABLE is recommended if you have a QLogiq F/C card. Having Bacula's spooling area in a fast disk partition (e.g. a RAID0 volume) would be a good idea too. Regards, Panagiotis