D. Lance Robinson wrote:
>
> Osma,
>
> RAID-1 does read balancing which may(?) be better than striping. Each
> read request is checked against the previous request, if it is
> contiguious with the previous request, it uses the same device,
> otherwise it switches to the next mirror. This process cycles through
> the mirrors (n-way mirrors.)
I agree.
>
> The bottom line: Read performance for a RAID-1 device is better than a
> single (JBOD) device. The bigger the n in n-way mirroring gives better
> read performance, but slightly worse write performance.
>
But using n-way mirrors will also increase cpu utilization during reads
-
or am I wrong? - because of the cycling process.
> <>< Lance.
>
> Osma Ahvenlampi wrote:
> >
> > Dietmar Stein <[EMAIL PROTECTED]> writes:
> > > Readperformance will only increase by using raid0 (stripe), but it will
> > > not be twice times faster.
> >
> > Does the Linux RAID-1 code still not stripe reads? I thought it did.
> >
> > --
> > Osma Ahvenlampi
Greets, Dietmar
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