Date: Tue, 18 Nov 2014 17:10:39 +0100 From: Andrei Brezan <andrei693@gmail.com> To: Arthur Chance <freebsd@qeng-ho.org>, Liste FreeBSD <freebsd-questions@freebsd.org> Subject: Re: Hardware RAID or software for ZFS Message-ID: <546B6F7F.2010902@gmail.com> In-Reply-To: <546B6D72.3060105@qeng-ho.org> References: <7F1B1DC4-46CA-4B96-836B-2D2D494F60E8@todoo.biz> <546B6D72.3060105@qeng-ho.org>
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On 11/18/14 17:01, Arthur Chance wrote: > On 18/11/2014 15:28, bsd@todoo.biz wrote: >> Hi, >> >> >> I would need your help in order to figure out which will be the best > > in order to setup a server which will be used as a Poudriere server. >> >> My question is related to the usage of hardware RAID controller (JBOD) > > or software based controller (graid) >> >> Server we are targeting is a SuperMicro 1018R-WC0R - 1U >> >> I used to build my server using an HBA such as LSI SAS 9207-8i or LSI > > SAS 9201-16i Then I’ll configure the HBA as JBOD so that disks can be > > presented correctly to the system so that we can build our ZFS FS on > > top of that. >> >> >> My sysadmin suggested me to get rid of the HBA and use direct > > connectivity and Graid. >> >> >> I would like to have some feedback on various aspects : >> >> 1. performance >> 2. usability >> 3. problem one might have encountered > > If you're intending to use ZFS don't use JBOD or graid, just tell > zpool to create a pool out of individual disks using raidz (or > raidz[23] if you have enough disks). > > As for your hardware choice, I'll let others with more experience than > me answer. > JBOD is presenting the disk directly to the OS so it is well suited for a ZFS setup. There are still raid controllers that have both raid capabilities and JBOD although some manufacturers try really hard to separate them for $ome reason. Most of the times you can re-write the firmware on such a device and have either raid capabilities or JBOD.
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