On 07/17/2009 11:49 AM, H. Peter Anvin wrote:
Ric Wheeler wrote:
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 :-)
Cost, yes, of changing an on-disk format.
-hpa
Putting RAID6 behind us, we still might be interested in the other encodings
that are in:
"A Performance Evaluation and Examination of Open-Source Erasure Coding
Libraries For Storage"
http://www.cs.utk.edu/~plank/plank/papers/FAST-2009.html
since they give us even more flexibility....
ric
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