Date: Sat, 18 May 2013 07:26:05 +0200 From: "bsd@todoo.biz" <bsd@todoo.biz> To: Liste FreeBSD <freebsd-questions@freebsd.org> Subject: Re: ZFS install on a partition Message-ID: <39FA940D-9410-4945-8BFB-EE1354A164AC@todoo.biz> In-Reply-To: <5FB78660-EDA4-40DB-8A0D-B0DE23A0FB6C@kraus-haus.org> References: <F744BBF1-D98C-47BF-9546-14D1A9CB3733@todoo.biz> <5FB78660-EDA4-40DB-8A0D-B0DE23A0FB6C@kraus-haus.org>
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Thanks for this documented answer.=20 Couple of comments though=85=20 Le 18 mai 2013 =E0 02:03, Paul Kraus <paul@kraus-haus.org> a =E9crit : > On May 17, 2013, at 6:24 PM, "bsd@todoo.biz" <bsd@todoo.biz> wrote: >=20 >> I know I should install a system using HBA and JBOD configuration - = but unfortunately this is not an option for this server.=20 >=20 > I ran many ZFS pools on top of hardware raid units, because that is = what we had. It works fine and the NVRAM write cache of the better = hardware raid systems give you a performance boost. >=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 > Sure. Be careful when you say RAID=85 I assume you mean RAIDz<n> = configured top level vdevs. Remember, a mirror is RAID-1 and the base = ZFS striping is considered RAID-0. So set it up as plain stripe of one = vdev :-) Ok so I'll use a dedicated volume (LUN) and install it as a RAID-0 vdev.=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 > If the system is configured with existing LUNS use them. >=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 >=20 > No. One of the biggest benefits of ZFS is the end to end data = integrity. IF there is a silent fault in the HW RAID (it happens), ZFS = will detect the corrupt data and note it. If you had a mirror or other = redundant device, ZFS would then read the data from the *other* copy and = rewrite the bad block (or mark that physical block bad and use another). >=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 > ZFS is stable, it is NOT as tuned as UFS just due to age. UFS in all = of it's various incarnations has been tuned far more than any filesystem = has any right to be. I spent many years managing Solaris system and I = was truly amazed at how tuned the Solaris version of UFS was. >=20 > I have been running a number of 9.0 and 9.1 servers in production, all = running ZFS for both OS and data, with no FS related issues. Ok - great answer.=20 I have setup a FreeNAS ZFS appliance (running native HBAs + JBOD) and = used it as a backup solution using snapshots.=20 This is why I wanted to have ZFS at first.=20 If you have any other advise - they are welcome.=20 Thanks a lot.=20 GB.=20 >=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 >>=20 >> _______________________________________________ >> freebsd-questions@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to = "freebsd-questions-unsubscribe@freebsd.org" >=20 > -- > Paul Kraus > Deputy Technical Director, LoneStarCon 3 > Sound Coordinator, Schenectady Light Opera Company >=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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