Date: Sat, 18 May 2013 07:55:54 +0000 From: Ivailo Tanusheff <Ivailo.Tanusheff@skrill.com> To: "bsd@todoo.biz" <bsd@todoo.biz> Cc: Liste FreeBSD <freebsd-questions@freebsd.org> Subject: RE: ZFS install on a partition Message-ID: <95973cab044c4e42ae70b564cf28897f@DB3PR07MB059.eurprd07.prod.outlook.com> In-Reply-To: <A5DFA968-F2B0-4E6A-A836-D0F76755D6A1@todoo.biz> References: <F744BBF1-D98C-47BF-9546-14D1A9CB3733@todoo.biz> <372082cab2064846809615a8073e022c@DB3PR07MB059.eurprd07.prod.outlook.com> <A5DFA968-F2B0-4E6A-A836-D0F76755D6A1@todoo.biz>
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Hi, If you go with RAID6 setup on your RAID I think you will not need spare so = much, as you will actually have data redundancy distributed over 2 disks. I think you can use 2 or 3 LUNS, just to have more flexibility in the solut= ion, but it is not a must :) For the usage of two copies on pool named "mypool" issue: zfs set copies=3D2 mypool Best regards, Ivailo Tanusheff -----Original Message----- From: bsd@todoo.biz [mailto:bsd@todoo.biz]=20 Sent: Saturday, May 18, 2013 10:46 AM To: Ivailo Tanusheff Subject: Re: ZFS install on a partition Le 18 mai 2013 =E0 09:21, Ivailo Tanusheff <Ivailo.Tanusheff@skrill.com> a = =E9crit : > Hi, >=20 > If you use HBA/JBOD then you will rely on the software RAID of the ZFS sy= stem. This is the config of my backup system - not the one I am planning to updat= e.=20 > Yes, this RAID is good, but unless you use SSD disks to boost performance= and a lot of RAM the hardware raid should be more reliable and mush faster= . Ok=20 > I didn't get if you want to use the system to dual boot Linux/FreeBSD or = just to share FreeBSD space with linux. Neither one !=20 I want to setup a full FreeBSD only system.=20 Will be used to deploy jails.=20 > But I would advise you to go with option 1 - you will get most of the sys= tem and obviously you don't need zpool with raid, as your LSI controller wi= ll do all the redundancy for you. Making software RAID over the hardware on= e will only decrease performance and will NOT increase the reliability, as = you will not be sure which information is stored on which physical disk. Ok >=20 > If stability is a MUST, then I will also advise you to go with bunch of p= ools and a disk designated as hot spare - in case some disk dies you will r= ely on the automation recovery. Also you should run monitoring tool on your= raid controller. I can't do that because of the design of the machine I will use.=20 I only have LUN's available configured as volume on top of a RAID 6 pool of= disks.=20 This is presented as a block device to the system.=20 > You can also set copies=3D2/3 just in case some errors occur, so ZFS can = auto0repair the data. if you run ZFS over several LUNs this will make even = more sense.=20 Ok I'll try to figure out how to do that during install in order to have th= at as soon as possible during the system install.=20 Thx.=20 >=20 > Best regards, > Ivailo Tanusheff >=20 > -----Original Message----- > From: owner-freebsd-questions@freebsd.org=20 > [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of=20 > bsd@todoo.biz > Sent: Saturday, May 18, 2013 1:24 AM > To: Liste FreeBSD > Subject: ZFS install on a partition >=20 > Hi, >=20 > I have a question regarding ZFS install on a system setup using an Intel = Modular.=20 >=20 > This system runs various flavor of FreeBSD and Linux using a shared pool = (LUNs).=20 > These LUNs have been configured in RAID 6 using the internal controller (= LSI logic).=20 >=20 > So from the OS point of view there is just a volume available.=20 >=20 >=20 > I know I should install a system using HBA and JBOD configuration - but u= nfortunately this is not an option for this server.=20 >=20 > What would you advise ?=20 >=20 > 1. Can I use an existing partition and setup ZFS on this partition using = a standard Zpool (no RAID).=20 >=20 > 2. Should I use any other solution in order to setup this (like full ZFS = install on disk using the entire pool with ZFS).=20 >=20 > 3. Should I avoid using ZFS since my system is not well tuned and It woul= d be asking for trouble to use ZFS in these conditions.=20 >=20 >=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 >=20 >=20 > Thanks.=20 >=20 >=20 ________________________________________________ =AB?=BB=A5=AB?=BB=A7=AB?=BB=A5=AB?=BB=A7=AB?=BB=A5=AB?=BB=A7=AB?=BB=A5=AB?= =BB=A7=AB?=BB=A5=AB?=BB=A7=AB?=BB=A5=AB?=BB=A7 =AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF= =AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF BSD - BSD - BSD - BSD - BSD - BSD - BSD - BSD - ___________________________= _____________________ =AB?=BB=A5=AB?=BB=A7=AB?=BB=A5=AB?=BB=A7=AB?=BB=A5=AB?=BB=A7=AB?=BB=A5=AB?= =BB=A7=AB?=BB=A5=AB?=BB=A7=AB?=BB=A5=AB?=BB=A7 =AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF= =AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF PGP ID --> 0x1BA3C2FD
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