Re: Erasure code library summary

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Loic Dachary wrote:

> Hi Ceph,
> 
<snip>
> Reed-Solomon coding family is the only one that can keep the chuncks
> unencoded and therefore concatenable.
<snip>

In my understanding, this is not strictly true - any 'systematic' code will 
have the unencoded chunks remain available in this manner, and any non-
systematic linear code can be transformed into a systematic code with the 
same minimum distance. Fountain codes are often explicitly constructed to 
maintain this property, as in the case of RaptorQ [RFC 6330].

https://en.wikipedia.org/wiki/Systematic_code

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