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SubjectRe: Linux Buffer Cache Does Not Support Mirroring

Actually, if you guys would design something a littler newer than circa
1973 for your buffer cache design, things would be easier. The buffer
cache acts this way becuase it is based on a PRIMITIVE design that's not
far off from the textbook description found in "UNIX: a practical
implementation." Novell was doing mirroring and distributed mirroring
since about 1984. We are just trying to get linux closer to the 1990's.

Jeff

Gerard Roudier wrote:
>
> On Sun, 31 Oct 1999, Peter Tonoli wrote:
>
> > > > What is problem with the RAID drivers?
> > >
> > > Could I try a couple of guesses?
> > [...]
> > > Guess number 2:
> > > ---------------
> > > Someone just missed that Linux has support for mirroring. ;-)
> >
> > Or... RAID is incompatible with NWFS :)
>
> Was basically my guess number 1, but your comments let guess number 3
> come to mind:
>
> Based on the description of the buffer changes for NWFS, it seems they can
> be used both. That means that NWFS for linux will be usable with software
> mirroring at the power of 2. People that uses recent I2O or later RAID
> controllers will even be able to use NWFS with mirroring at the power of
> 3. ;-)
>
> Gérard.
>
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