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.
That's why bonnie results can fall off. However, if you have
independent IOs going on (web/news/mail service or multiuser machines)
then that concurrent activity may still be faster with larger chunk
sizes, as you minimise the chance of any one file access having to cross
multiple disks.
In other words, all benchmarks lie. :)
--Stephen
