Disk I/O Performance with CCD

[Charles Sprickman]

On Tue, 19 Oct 2004, Kristofer Pettijohn wrote:

> I've used tunefs to set the average file size to 20 MB and enabled
> soft-updates, as these are generally larger binary files that just
> get appended to, and then seeked later on to send the article out,
> I've played with setting the stripe size from anywhere between 8MB
> and 64MB, and did not see much change on performance between those.

It's been awhile since I played with ccd and news, but isn't there a
stripe size setting when you configure ccd?  Fiddling with that might be
interesting.  If the stripe is small and your files are big, I imagine
performance would suffer.

Charles

> Maybe I'm just missing something small, but on these SCSI drives
> which have 160 MB/s transfer rates, I'm expecting a bit more than
> I'm getting with CCD.
>
> Can someone give me any pointers to look at or suggestions of things
> to try?
>
> Thanks!
>
> Kristofer
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