This is great stuff.
Now, how can we get this into btrfs and md?
On Wed, Nov 20, 2013 at 1:23 PM, Andrea Mazzoleni <amadvance@xxxxxxxxx> wrote:
> Hi,
>
>> First, create a 3 by 6 cauchy matrix, using x_i = 2^-i, and y_i = 0 for i=0, and y_i = 2^i for other i.
>> In this case: x = { 1, 142, 71, 173, 216, 108 } y = { 0, 2, 4). The cauchy matrix is:
>>
>> 1 2 4 8 16 32
>> 244 83 78 183 118 47
>> 167 39 213 59 153 82
>>
>> Divide row 2 by 244 and row 3 by 167. Then extend it with a row of ones on top and it's still MDS,
>> and that's the code for m=4, with RAID-6 as a subset. Very nice!
>
> You got it Jim!
>
> Thanks,
> Andrea
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