Date: Sat, 18 May 2013 07:21:47 +0000 From: Ivailo Tanusheff <Ivailo.Tanusheff@skrill.com> To: "bsd@todoo.biz" <bsd@todoo.biz>, Liste FreeBSD <freebsd-questions@freebsd.org> Subject: RE: ZFS install on a partition Message-ID: <372082cab2064846809615a8073e022c@DB3PR07MB059.eurprd07.prod.outlook.com> In-Reply-To: <F744BBF1-D98C-47BF-9546-14D1A9CB3733@todoo.biz> References: <F744BBF1-D98C-47BF-9546-14D1A9CB3733@todoo.biz>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, If you use HBA/JBOD then you will rely on the software RAID of the ZFS syst= em. Yes, this RAID is good, but unless you use SSD disks to boost performan= ce and a lot of RAM the hardware raid should be more reliable and mush fast= er. I didn't get if you want to use the system to dual boot Linux/FreeBSD or ju= st to share FreeBSD space with linux. But I would advise you to go with option 1 - you will get most of the syste= m and obviously you don't need zpool with raid, as your LSI controller will= do all the redundancy for you. Making software RAID over the hardware one = will only decrease performance and will NOT increase the reliability, as yo= u will not be sure which information is stored on which physical disk. If stability is a MUST, then I will also advise you to go with bunch of poo= ls and a disk designated as hot spare - in case some disk dies you will rel= y on the automation recovery. Also you should run monitoring tool on your r= aid controller. You can also set copies=3D2/3 just in case some errors occur, so ZFS can au= to0repair the data. if you run ZFS over several LUNs this will make even mo= re sense.=20 Best regards, Ivailo Tanusheff -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@f= reebsd.org] On Behalf Of bsd@todoo.biz Sent: Saturday, May 18, 2013 1:24 AM To: Liste FreeBSD Subject: ZFS install on a partition Hi,=20 I have a question regarding ZFS install on a system setup using an Intel Mo= dular.=20 This system runs various flavor of FreeBSD and Linux using a shared pool (L= UNs).=20 These LUNs have been configured in RAID 6 using the internal controller (LS= I logic).=20 So from the OS point of view there is just a volume available.=20 I know I should install a system using HBA and JBOD configuration - but unf= ortunately this is not an option for this server.=20 What would you advise ?=20 1. Can I use an existing partition and setup ZFS on this partition using a = standard Zpool (no RAID).=20 2. Should I use any other solution in order to setup this (like full ZFS in= stall on disk using the entire pool with ZFS).=20 3. Should I avoid using ZFS since my system is not well tuned and It would = be asking for trouble to use ZFS in these conditions.=20 P.S. Stability is a must for this system - so I won't die if you answer "3"= and tell me to keep on using UFS.=20 Thanks.=20
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?372082cab2064846809615a8073e022c>