[CentOS] distributed storage/home-made cloud recommendations

On 02/06/2012 12:33 AM, John R Pierce wrote:
> On 02/05/12 3:24 PM, Ross Walker wrote:
>> It might be easier to do the striping in software cause that's a zero over-head operation and it makes the hardware RAID easier to setup, maintain and can make rebuilds less painful depending on the controller.
>
> I just tried a bunch of combinations on a 3 x 11 raid60 configuration
> plus 3 global hotspares, and decided that letting the controller (LSI
> 9260-8i MegaSAS2) do it was easier all the way around.   of course, with
> other controllerrs, your mileage may vary.  and yes, megacli64 is an
> ugly tool to tame.
>
> with 3TB SAS drives, single drive failures rebuild in 12 hours, double
> failures in 18 hours.  (failures forced by disabling drives via megacli)
>
>
>

What about Software RAID 10 (far)? It gives 2 x read speed and 1 x write 
speed (speed of single HDD).

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PL Computers
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