Re: [Iometer-user] iometer and EMC arrays

[Sander P. <t. _ t. _ com>]

Can you please send the icf file that contains all the details? I can't see
how many outstanding IOs etc. you've configured IOMeter for.

Someone else will need to take a look at the results. It's odd that none of
the CPUs report any numbers, only the managers do. Then again this may be as
expected.

Is your storage directly connected to your host? Loop? Point to Point?
Speed?

I did some tests with a SUN SBUS adapter in an 8 CPU E3500 and it was pretty
slow.

Basically the problem with performance measurements is determining where the
bottleneck is. Your CPUs are pretty darn busy at 50% utilization. Doing
random IO over such a large area pretty much takes cache out of the picture
too. You could do a 512 byte sequential read test over a small area (say
1000 blocks) and see how many IOps you get. Then do the same with writes.
Then Large reads and writes. Those will give you upper limits for IOps and
MBps numbers. Your IO pattern will do much worse on both counts. Make sure
you tell IOMeter to have at least 16 outstanding IOs, maybe more given the
number of CPUs you have. Experiment. I assume that the '1000' is an HBA
setting but it's rather high.

    Sander


----- Original Message ----- 
From: "Hans-Georg Kiesser" <han...@op...>
To: <iom...@li...>
Sent: Wednesday, November 03, 2004 12:07 PM
Subject: Re: [Iometer-user] iometer and EMC arrays


> uups, sorry - yep forgot some info.
>
> I have 2 HBA's (c7 and c8 as per iostat below)
> number of outstanding I/Os - 1000
> Test connection rate 1 per target
>
> load file is attached
> a results file as well.
> /mfs/mfs1 is a single EMC device
> /oradata/mss/arch is striped over 7 EMC devices
> so I would expect /oradata/mss/arch to be able to handle much more load,
which
> seem not to be the case
>
> thanks
> cheers
> Hans
>
> Sander Pool wrote:
>
> > You haven't really provided any pertinent information yet. Can you
please
> > let us know what your connectivity is like (HBAs/switches/speeds) and
also
> > what type of load you're generating? What is your traffic pattern? How
many
> > outstanding IOs?
> >
> >     Sander
> >
>