[EMAIL PROTECTED] wrote:
>
> Hi all.
> I'm trying to do some benchmarking on different filesystems on a software
> raidarray and I've expiriencing no write speedup from the single disk setup
> to a 3 disk raid 0 setup using reiserfs. I'm using the sequential test of
> bonnie as a benchmark - wich is ofcourse not representative of reallife performance,
> but as far as I can still give some speedup. Maybee someone can help me out?
The only raid level that has the best write speedup performance (if you
are interested by this only)
is raid0. The only way to increase it (with fixed chunk size - I
reccomend 128K) is increase the number of raid disks.
Probably you want a benchmark more close to real life then bonnie is.
You can try mongo.pl for your investigations:
http://www.namesys.com/benchmarks/mongo/mongo_readme.html
Anyway it allows to fill the difference between single disk and raid
array that contains 3 raid disks.
Thanks,
Edward.
>
> The hardware is:
> CyrixIII 550Mhz CPU, AOpen MX3ZA motherboard
> 256MB PC133 RAM
> 3xMaxtor Diamond Max Plus (7200 RPM) 60GB disks
> 1 or 2 Promise Ultra 100 Tx2 ATA100 controlers
>
> The software is Debian 2.2 with a few major updates (gcc and more)
> running Linux 2.4.5 with the latest patches for the Promise controller
> and SGI XFS filesystem.
>
> These are my results (for different chunk-sizes):
> Single disk read : 35.201
> Single disk write: 24.677
>
> -----4kB----- -----8kB----- ----32kB-----
> Read Write Read Write Read Write
> 57.897 25.215 57.789 23.400 60.442 24.168
>
> ----64kB----- ----128kB---- ----256kB----
> Read Write Read Write Read Write
> 59.045 23.421 61.696 23.640 62.273 23.517
>
> Regards Martin Leopold.
> Dept. of Computer Science, University of Copenhagen
