Date: Sun, 16 May 2010 23:03:58 +0300 From: Panagiotis Christias <christias@gmail.com> To: Paul Mather <paul@gromit.dlib.vt.edu> Cc: freebsd-questions@freebsd.org Subject: Re: Quantum SuperLoader 3 under Bacula on FreeBSD 8 Message-ID: <AANLkTin8yK5l1NsgUkn19Oz3lys-0FfA_1cScTKd4ibs@mail.gmail.com> In-Reply-To: <DAA8CE35-81D0-43D6-97BC-E8CB897F97A5@gromit.dlib.vt.edu> References: <DAA8CE35-81D0-43D6-97BC-E8CB897F97A5@gromit.dlib.vt.edu>
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On Fri, May 14, 2010 at 4:29 AM, Paul Mather <paul@gromit.dlib.vt.edu> 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
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