Subject: Re: [Fwd: CCD performance tuning]
To: NetBSD Users <>
From: Aaron J. Grier <>
List: netbsd-users
Date: 01/22/2002 08:22:37
On Tue, Jan 22, 2002 at 09:01:46AM +0100, Uwe Lienig wrote:

> right at the beginning of the year I've pushed a question onto the
> netbsd-pmax-list. Since nobody replied to it, I reposted my question.
> Since the question isn't pmax-specific I was given the advise to post
> this question to this list instead of the platform list - so here it
> goes.

what is the question?  I see a nifty shell script for testing speed of
ccd arrays and results of running your test, but I see no direct
question posed.

if you are wondering whether or not your results are good, I would
suggest that you use additional metrics to dd.  raw I/O is only one part
of disk performance; you have ignored seek time, for instance.  there
are tools in pkgsrc (bonnie and iozone come to mind) which can be used
to get a better feel for overall performance.

  Aaron J. Grier | "Not your ordinary poofy goof." |
          "Making people dance so hard their pants almost fall
                 off is kind of fun."  -- David Evans