Re: [PATCH 1/4] md: Factor out RAID6 algorithms into lib/

H. Peter Anvin
2009-07-17T15:20:00Z

Ric Wheeler wrote:
>
> Worth sharing a pointer to a really neat set of papers that describe
> open source friendly RAID6 and erasure encoding algorithms that were
> presented last year and this at FAST:
>
> http://www.cs.utk.edu/~plank/plank/papers/papers.html
>
> If I remember correctly, James Plank's papers also have implemented and
> benchmarked the various encodings,
>

I have seen the papers; I'm not sure it really makes that much
difference. One of the things that bugs me about these papers is that
he compares to *his* implementation of my optimizations, but not to my
code. In real life implementations, on commodity hardware, we're
limited by memory and disk performance, not by CPU utilization.

-hpa