Thanks for this documented answer. Couple of comments though…
Le 18 mai 2013 à 02:03, Paul Kraus <[email protected]> a écrit : > On May 17, 2013, at 6:24 PM, "[email protected]" <[email protected]> wrote: > >> I know I should install a system using HBA and JBOD configuration - but >> unfortunately this is not an option for this server. > > 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. > >> What would you advise ? >> >> 1. Can I use an existing partition and setup ZFS on this partition using a >> standard Zpool (no RAID). > > Sure. Be careful when you say RAID… 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. > >> 2. Should I use any other solution in order to setup this (like full ZFS >> install on disk using the entire pool with ZFS). > > If the system is configured with existing LUNS use them. > >> 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. > > 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). > >> 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. > > 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. > > 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. I have setup a FreeNAS ZFS appliance (running native HBAs + JBOD) and used it as a backup solution using snapshots. This is why I wanted to have ZFS at first. If you have any other advise - they are welcome. Thanks a lot. GB. > >> >> >> Thanks. >> >> >> ________________________________________________ >> «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ >> ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ >> BSD - BSD - BSD - BSD - BSD - BSD - BSD - BSD - >> ________________________________________________ >> «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ >> ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ >> PGP ID --> 0x1BA3C2FD >> >> _______________________________________________ >> [email protected] mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to "[email protected]" > > -- > Paul Kraus > Deputy Technical Director, LoneStarCon 3 > Sound Coordinator, Schenectady Light Opera Company > ________________________________________________ «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ BSD - BSD - BSD - BSD - BSD - BSD - BSD - BSD - ________________________________________________ «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ PGP ID --> 0x1BA3C2FD _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[email protected]"
