From mboxrd@z Thu Jan 1 00:00:00 1970 From: linbloke Subject: Re: Raid 6--best practices Date: Mon, 23 Jan 2012 10:25:45 +1100 Message-ID: <4F1C9AF9.2000201@fastmail.fm> References: <4F173D3D.6070902@npr.org> , Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Shain Miley Cc: "linux-raid@vger.kernel.org" List-Id: linux-raid.ids On 20/01/12 2:16 PM, Shain Miley wrote: > Mathias, > Thank you very much for the helpful advice. > > Shain > > ________________________________________ > From: Mathias Bur=E9n [mathias.buren@gmail.com] > Sent: Thursday, January 19, 2012 10:06 PM > To: Shain Miley > Cc: linux-raid@vger.kernel.org > Subject: Re: Raid 6--best practices > > On 20 January 2012 02:54, Shain Miley wrote: >> Hello all, >> I have been doing some research into possible alternatives to our >> OpenSolaris/ZFS/Gluster file server. The main reason behind this is= , >> due to RedHat's recent purchase of Gluster, our current configuratio= n >> will no longer be supported and even before the acquisition, the upg= rade >> path for the OpenSolaris/ZFS stack was murky at best. >> >> The current servers in question consist of a total of 48, 2TB drives= =2E >> My thought was that I would setup a total of 6 RAID-6 arrays (each >> containing 7 drives + a spare or a flat 8 drive RAID-6 config) and p= lace >> LVM + XFS on top of that. >> >> My questions really are: >> >> a) What is the maximum number of drives typically seen in a RAID-= 6 >> setup like this? I noticed when looking at the Backblaze blog, that >> they are using RAID-6 with 15 disks (13 + 2 for parity). That numbe= r seemed >> kind of high to me....but I was wondering what others on the list th= ought. >> >> b) Would you recommend using any specific Linux distro over any o= ther? >> Right now I am trying to decide between Debian and Ubuntu....but I w= ould be open to >> any others...if there was a legitimate reason to do so (performance,= stability, etc) in terms of the Raid codebase. >> >> Thanks in advance, >> >> Shain >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-raid= " in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > Hi, > > Personally I wouldn't use more than 10 HDDs in a RAID6 setup (+ spare > perhaps). Regarding the choice of distribution, it doesn't matter > really. Pick the one you're comfortable with. > > Good luck! > > /M Whilst I love Debian, I find the release schedule a bit frustrating. If= =20 you can hold off until May (a big stretch for projects wanting to go=20 now, I know), then it may be worth looking at Ubuntu 12.04 LTS and get = 5=20 years of supported OS. https://wiki.ubuntu.com/PrecisePangolin/ReleaseSchedule Just a thought. Get Debian stability and Ubuntu long term support. Cheers, Josh > > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html