Date: Tue, 18 Nov 2014 17:26:35 +0100 From: "bsd@todoo.biz" <bsd@todoo.biz> To: Liste FreeBSD <freebsd-questions@freebsd.org> Subject: Re: Hardware RAID or software for ZFS Message-ID: <9AAAB1C9-C75F-48BB-A21A-9979B61E44B5@todoo.biz> In-Reply-To: <546B6F7F.2010902@gmail.com> References: <7F1B1DC4-46CA-4B96-836B-2D2D494F60E8@todoo.biz> <546B6D72.3060105@qeng-ho.org> <546B6F7F.2010902@gmail.com>
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> Le 18 nov. 2014 à 17:10, Andrei Brezan <andrei693@gmail.com> a écrit : > > > 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. > Ok. So with SAS disks, I’ll most probably need a controller / HBA with JBOD capabilities ? Like that disks will be presented directly to the OS where I’ll handle the RAIDZ as needed. Is that correct ? Or is there any other « native » option ? Thx very much. ________________________________________________ «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ Your provider of OpenSource Appliances www.osnet.eu ________________________________________________ «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ PGP ID --> 0x1BA3C2FD
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