Re: Performance Characteristics of All Linux RAIDs (mdadm/bonnie++)

[Alan Cox]

On Wed, 28 May 2008 18:34:00 +0200
"Jens BÃckman" <jens.backman@xxxxxxxxx> wrote:

> On Wed, May 28, 2008 at 10:53 AM, Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx> wrote:
> > Results:
> >
> > http://home.comcast.net/~jpiszcz/raid/20080528/raid-levels.html
> > http://home.comcast.net/~jpiszcz/raid/20080528/raid-levels.txt
> 
> Either the RAID 1 read speed must be wrong, or something is odd in the
> Linux implementation. There's six drives that can be used for reading
> at the same time, as they contain the very same data. 63MB/s
> sequential looks like what you would get from a single drive.

Which is fairly typical of a cheap desktop PC where the limitation is the
memory and PCI bridge as much as the drive.

Alan
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