Re: Benchmark Disk IO

[Benjamin Franz <jfranz@xxxxxxxxxxx>]

On 05/19/2010 02:44 AM, Matt Keating wrote:
> 2010/5/6 Matt Keating<keatster@xxxxxxxxx>:
>    
>> Thanks for all the updates. Will look into iozone and the advice given
>> about the rest.
>>      
> Either I'm doing/reading something wrong or a 1TB SATA 7200 RPM drive
> is faster than 4x300GB SCSI 10K RPM drives in raid 10.
> Both of the results below were from iozone, running the following command:
> $ iozone -R -l 5 -u 5 -r 4k -s 100m -F /tmp/F1 /tmp/F2 /tmp/F3 /tmp/F4 /tmp/F5
>
>    
[...]
> Am I doing something wrong? Please advise.
>    

I don't usually use iozone (I usually use bonnie++) so take this with a 
grain of salt, but those speed look suspiciously like cache speeds. Bump 
the size (-s parameter) up to twice your real RAM size.

-- 
Benjamin Franz
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