Re: ORION num_disks

That is pretty impressive!

Largest MBPS I have got so far is around 900 MBPS.

You used 45 for num_disks, was that 45 disks from OS view?

Thanks

--
LSC



On Fri, Sep 12, 2008 at 4:50 PM, Greg Rahn <greg_at_structureddata.org> wrote:



> Normally it is set to the number of physical drives, but it can be

> adjusted higher or lower depending on how much load you want to drive.

>

> Here is a couple command lines and summary that I used from a Sun

> Thumper(http://www.sun.com/servers/x64/x4500/) for testing I/O

> bandwidth using 1MB reads for a data warehouse workload.

>

> -run advanced -type seq -testname thumper_seq -num_disks 45 -matrix

> point -num_large 45 -num_small 0 -num_streamIO 16 -disk_start 0

> -disk_end 150 -cache_size 0

> Maximum Large MBPS=2668.88 @ Small=0 and Large=45

>

> -run advanced -type rand -testname thumper_rand -num_disks 180 -matrix

> point -num_large 720 -num_small 0 -duration 60 -disk_start 0 -disk_end

> 150 -cache_size 0

> Maximum Large MBPS=1758.35 @ Small=0 and Large=720

>

> On Fri, Sep 12, 2008 at 2:27 AM, LS Cheng <exriscer_at_gmail.com> wrote:

> > Hi

> >

> > Does anyone know what value should be used for num_disks argument when

> > running I/O stress tests with ORION?

> >

> > For example consider I have a RAID Group within an EMC Clariion CX-700

> SAN,

> > formed by 8 physical disks and striped using RAID 1+0, then from this

> RAID

> > Group 4 LUN are created and presented to the server.

> >

> > What is the value for num_disks, 8 or 4?

>

>

> --

> Regards,

> Greg Rahn

> http://structureddata.org

>


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