People using RAID-6?

People using RAID-6?

[H. Peter Anvin]

People, if you actually use RAID-6, please do let me know.  I'd like
to gauge the size of the user commnunity; it's going to matter a lot
for how stable it can be assumed to be.

Please include the # of disks as well as if you have had any
recoveries.

	-hpa
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Re: People using RAID-6?

[Dominik Kubla]

On Fri, Feb 13, 2004 at 06:20:56AM +0000, H. Peter Anvin wrote:
> People, if you actually use RAID-6, please do let me know.  I'd like
> to gauge the size of the user commnunity; it's going to matter a lot
> for how stable it can be assumed to be.
> 
> Please include the # of disks as well as if you have had any
> recoveries.
> 
> 	-hpa

What is your own estimation? Is it useable for production systems?
What is the recommended code basis? Our customers are _VERY_ conservative
(read: bankers), so they are mostly going with mirrors or striped mirrors.

Is there any performance data for different work loads? Eg. how does it
work for file service with different file sizes, read/write patterns.

Since most of our customers need database storage RAID1 still seems to be
the best appoach.

Regards,
  Dominik Kubla
-- 
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anyway.
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Re: People using RAID-6?

[H. Peter Anvin]

Dominik Kubla wrote:
> 
> What is your own estimation? Is it useable for production systems?
> What is the recommended code basis? Our customers are _VERY_ conservative
> (read: bankers), so they are mostly going with mirrors or striped mirrors.
> 

I wouldn't try that at this point.  I'm trying to figure out if there is 
a userbase and how big it is, but the code is still very new.

> Is there any performance data for different work loads? Eg. how does it
> work for file service with different file sizes, read/write patterns.

It seems to be comparable to RAID-5 for reads down to about half the 
speed of RAID-5 for lots of small writes.

> Since most of our customers need database storage RAID1 still seems to be
> the best appoach.

Probably.

	-hpa