On Mon, 26 Apr 1999, Stephen C. Tweedie wrote:
Hi,
On Thu, 22 Apr 1999 20:45:52 +0100 (IST), Paul Jakma <[EMAIL PROTECTED]>
said:
> i tried this with raid0, and if bonnie is any guide, the optimal
> configuration is 64k chunk size, 4k e2fs block size.
Going much above 64k will mean that readahead has to work very much
harder to keep all the pipelines full when doing large sequential IOs.
it was close between 32k and 64k. 128k was noticably slower (for
bonnie) so i didn't bother with 256k.
viz pipelining: would i be right in thinking that a decent scsi
controller and drives can "pipeline" /far/ better than, eg, a udma
setup?
ie the optimal chunk size would be higher for a scsi system than for
an eide/udma setup?
In other words, all benchmarks lie. :)
think someone should tell "tom's hardware guide". :)
--Stephen
--
Paul Jakma
[EMAIL PROTECTED] http://hibernia.clubi.ie
PGP5 key: http://www.clubi.ie/jakma/publickey.txt
-------------------------------------------
Fortune:
We have not inherited the earth from our parents, we've borrowed it from
our children.
