From: Kerin Millar <kerframil@fastmail.co.uk>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] RAID 1 install guide?
Date: Sat, 22 Feb 2014 16:34:02 +0000 [thread overview]
Message-ID: <5308D17A.1080908@fastmail.co.uk> (raw)
In-Reply-To: <407439f91e8aeadd78901c3c7af1a535.squirrel@www.antarean.org>
On 05/09/2013 07:13, J. Roeleveld wrote:
> On Thu, September 5, 2013 05:04, James wrote:
>> Hello,
>>
>> What would folks recommend as a Gentoo
>> installation guide for a 2 disk Raid 1
>> installation? My previous attempts all failed
>> to trying to follow (integrate info from)
>> a myriad-malaise of old docs.
>
> I would start with the Raid+LVM Quick install guide:
> http://www.gentoo.org/doc/en/gentoo-x86+raid+lvm2-quickinstall.xml
>
>> It seems much of the documentation for such is
>> deprecated, with large disk, newer file systems
>> (ZFS vs ext4 vs ?) UUID, GPT mdadm, etc etc.
>
> Depending on the size of the disk, fdisk or gdisk needs to be used.
> Filesystems, in my opinion, matter only for the data intended to be put on.
>
> For raid-management, I use mdadm. (Using the linux kernel software raid)
> If you have a REAL hardware raid card, I would recommend using that.
> (Cheap and/or onboard "raid" is generally slower then the software raid
> implementation in the kernel and the added bonus of being able to recover
> the raid using any other linux installation helps.
>
>> File system that is best for a Raid 1 workstation?
>
> I use Raid0 (striping) on my workstations with LVM and, mostly, ext4
> filesystems. The performance is sufficient for my needs.
> All my important data is stored on a NAS with hardware Raid-6, so I don't
> care if I loose the data on the workstations.
>
>> File system that is best for a Raid 1
>> (casual usage) web server ?
>
> Whichever filesystem would be best if you don't use Raid.
> Raid1 means all data is duplicated, from a performance P.O.V., it is not a
> good option. Not sure if distributed reads are implemented yet in the
> kernel.
They are. It's perfectly good for performance, provided the array is of
insufficient magnitude to encounter a bottleneck pertaining to
controller/bus bandwidth.
--Kerin
next prev parent reply other threads:[~2014-02-22 16:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-05 3:04 [gentoo-user] RAID 1 install guide? James
2013-09-05 6:13 ` J. Roeleveld
2014-02-22 16:34 ` Kerin Millar [this message]
2013-09-05 6:17 ` Marc Stürmer
2013-09-06 15:41 ` [gentoo-user] " James
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