It is also possible to quickly multiply by 2^-1 which makes for an interesting R parity. Andrea Mazzoleni <amadvance@xxxxxxxxx> wrote: >Hi David, > >>> The choice of ZFS to use powers of 4 was likely not optimal, >>> because to multiply by 4, it has to do two multiplications by 2. >> I can agree with that. I didn't copy ZFS's choice here >David, it was not my intention to suggest that you copied from ZFS. >Sorry to have expressed myself badly. I just mentioned ZFS because it's >an implementation that I know uses powers of 4 to generate triple >parity, and I saw in the code that it's implemented with two >multiplication >by 2. > >Ciao, >Andrea -- Sent from my mobile phone. Please pardon brevity and lack of formatting. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
