[ale] XFS on Linux - Is it ready for prime time?

[Jim Kinney]

reading -1 . math -1 . must have gone to public school in Georgia...

:-)

On Thu, Apr 22, 2010 at 3:10 PM, Lightner, Jeff <jlightner at water.com> wrote:

>   Maybe not great with reading either – he said per active PAIR not
> SPARE.  :p
>
>
>  ------------------------------
>
> *From:* ale-bounces at ale.org [mailto:ale-bounces at ale.org] *On Behalf Of *Greg
> Clifton
> *Sent:* Thursday, April 22, 2010 2:43 PM
>
> *To:* Atlanta Linux Enthusiasts - Yes! We run Linux!
> *Subject:* Re: [ale] XFS on Linux - Is it ready for prime time?
>
>
>
> Hey, I'm not great with math, but if you have one hot spare for each active
> spare, wouldn't you need mirrored quadruplets?
>
> On Thu, Apr 22, 2010 at 2:26 PM, Jim Kinney <jim.kinney at gmail.com> wrote:
>
> RAID 5 was an invention for a time when hard drives were total crap tons of
> money. The pain of losing a drive in a RAID 5 array is just no longer
> balanced by the cost of the drives. If a 1TB drive is only $100, it's
> bluntly dirt cheap now to have a hot spare in a 4 active drive RAID 10
> system. The recovery is much easier and faster when checksums don't have to
> be calculated for every stinking block on the drive(s).
>
> My ideal rig: Striped array for speed composed of mirrored triplets - 2
> active, one hot spare per active pair.
>
>
>
> On Thu, Apr 22, 2010 at 1:05 PM, Greg Clifton <gccfof5 at gmail.com> wrote:
>
> Shift in focus to the hardware side of the equation. This thread
> concentrates on software generated corruption issues, but I have some
> hardware related questions. First, with RAIDed hard drives, are any file
> systems more or less likely to cause (or minimize) the likelihood of
> corruption of the array and if so, why? Second Greg F (and others) have
> commented on NOT using RAID 5 (and RAID 6) esp. with large hard drives.
> Looks like 1 or 2 TB hard drives will soon be "standard issue" for
> everything but notebook computers. So does that mean that RAID should be
> considered 'dead,' except for 0, 1, 10? Third, would SSDs solve the failure
> from bad sector issues with HDDs and thus be safe for RAID 5/6
> implementations?
>
>
>
>
> On Thu, Apr 22, 2010 at 9:41 AM, Ed Cashin <ecashin at noserose.net> wrote:
>
> On Wed, Apr 21, 2010 at 9:34 PM, Doug McNash <dmcnash at charter.net> wrote:
> ...
>
> > Does anyone out there use xfs? How about a suggestion for a stable
> replacement.
>
> If you use the xfs in the mainline kernel, it's a crap shoot because
> of the amount of churn in the code, but
> if you use a long-term kernel like 2.6.16.y, 2.6.27.y, or the kernels
> maintained by distros, then it ought to be stable (as long as the
> distro has enough of a user base for other people to find the xfs
> bugs first).
>
> --
>  Ed Cashin <ecashin at noserose.net>
>  http://noserose.net/e/
>  http://www.coraid.com/
>
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>   --
> --
>
> James P. Kinney III
> Actively in pursuit of Life, Liberty and Happiness
>
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-- 
-- 
James P. Kinney III
Actively in pursuit of Life, Liberty and Happiness
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