Greg Lehey <[email protected]> wrote:
> On Thursday, 17 June 1999 at 3:43:10 -0400, David E. Cross wrote:
> > I have a drive that is rated at ~16 Meg/second, and indeed it delivers on t
> he
> > order of 15+ Meg/second. If I use Vinum to create a concatinated device
> > of 2 such units performance drops to 2.5 Meg/sec. This seems like a
> > drastic drop in performance.
>
> Indeed, if you're comparing apples with apples.
Possible marginally-related data point: with the 3.1-RELEASE vinum,
and with striped drives (yes, I know the original user is using
concatenated devices), I saw pretty bad write performance with the
default filesystem frag size. Increasing the frag size (via newfs),
increased performance substantially.
--
Darryl Okahata
[email protected]
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