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

[Jim Kinney]

On Thu, Apr 22, 2010 at 2:44 PM, Greg Freemyer <greg.freemyer at gmail.com>wrote:

> Jim,
>
> Linux mdraid supports 3 drive mirrors.  You should have similar write
> performance to a 2 drive mirror and improved read-performance.
>
> So if your using mdraid, you might want to consider raid 10 with 3
> drive mirrors, and maybe one hot spare for the whole array.
>

I like this even better!

>
> Greg
>
> 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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> >>
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> >
> >
> >
> > --
> > --
> > James P. Kinney III
> > Actively in pursuit of Life, Liberty and Happiness
> >
> >
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>
>
>
> --
> Greg Freemyer
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-- 
-- 
James P. Kinney III
Actively in pursuit of Life, Liberty and Happiness
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