Ric Wheeler wrote:
The main flaw, as I said, is in the phrase "as implemented by the
Jerasure library". He's comparing his own implementations of various
algorithms, not optimized implementations.
The bottom line is pretty much this: the cost of changing the encoding
would appear to outweigh the benefit. I'm not trying to claim the Linux
RAID-6 implementation is optimal, but it is simple and appears to be
fast enough that the math isn't the bottleneck.
Cost? Thank about how to get free grad student hours testing out things
that you might or might not want to leverage on down the road :-)
Anyway... I don't really care too much. If someone wants to redesign
the Linux RAID-6 and Neil decides to take it I'm not going to object.
I'm also not very likely to do any work on it.
-hpa
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