Here is what I am seeing on the following system:
Athlon 1GHZ
Ultra2 LVD SCSI 10K RPM disk
256MB Memory
To be sure, I ran it several times. I used a package called bonnie to get these
numbers.
- XFS mounted with default mount options
---------Sequential Output------------
-Per Char- --Block--- -Rewrite--
K/sec %CPU K/sec %CPU K/sec %CPU
6736 84.7 43180 24.9 9902 8.5
-----Sequential Input--- --Random--
-Per Char- --Block--- --Seeks---
K/sec %CPU K/sec %CPU /sec %CPU
6284 76.0 57735 26.5 871.6 3.1
- XFS mounted with kio mount option
-------Sequential Output---------------
-Per Char- --Block--- -Rewrite--
K/sec %CPU K/sec %CPU K/sec %CPU
7454 92.0 143541 81.3 101492 79.3
-----Sequential Input--- --Random--
-Per Char- --Block--- --Seeks---
K/sec %CPU K/sec %CPU /sec %CPU
7785 93.6 262545 92.3 24547.3 98.2
The block level I/O is amazing and actually beyond the capabilities of Ultra2
SCSI.
Are these numbers for real????? Ultra2 LVD runs at 80MB/s not 260MB/s.
Dave Lounsberry
dbl@xxxxxxxxxxxxx
>
> Hi,
>
> What are the gains of using the "kio" mount options? Are
> kiobufs faster than buffer heads, or they just allow more
> efficient merging of requests?
>
> Thanks,
>
> --
> Petru Paler, mailto:ppetru@xxxxxxxxxx
> http://www.ppetru.net - ICQ: 41817235
>
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