Benchmark Raid 5 SCSI U160

[Kenneth D. Merry]

On Mon, Sep 29, 2003 at 22:52:10 +0800, Edy Lie wrote:
> Greetings,
> 
> I have done a benchmark on the following configuration.
> 
> RAID 5 SCSI U160 Benchmark 
> 
> The following is the benchmark result
>  OS: FreeBSD 4.8p4
>  Dual 1GHZ Proc
>  1GB ECC RAM
>  18GBx5 (RAID5) 10K RPM
>  Adaptec 2100s (32MB ECCRAM)
>  Software: bonnie
>  parameter: bonnie -m ANUBIS -s 100M
>  
>  -------Sequential Output-------- ---Sequential Input-- --Random--
>  -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
>  Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU
> /sec%CPU 
> 
> ANUBIS 100 3959 7.9 4065 2.8 3763 2.5 33936 100.0 497807 100.0 39277.7
> 198.5
>  
> I do not have other to compare. what do you guys think about the result
> ?

I assume you're going through the filesystem?  If so, you need to make sure
that your test file size is a good bit larger than your memory size.  100MB
won't quite do the trick.  You need something like a 4GB file to make sure
you aren't really getting any caching effects, especially on reads.

You can tell you're hitting the cache on the block sequential reads.  A
single channel Ultra160 RAID controller can't do 498MB/sec.

Ken
-- 
Kenneth Merry
ken at kdm.org