Re: Stess Test Power System

[Jim Oberholtzer <midrangel@xxxxxxxxxxxxxxxxx>]

James;

A couple of my clients have accomplished this by taking the system to 
2GB of memory (an absolute minimum for V6 or V7 and really small for V5) 
and setting up the remaining  memory the same as it would be in 
production.  Then let 5 or 10 folks go at it.  Slowly increase the 
amount of available memory until your at full production.  Each test 
with more memory should give you some indication what the system would 
be like when loaded up.  This is not particularly scientific, but it 
will do for most auditors.  Clearly there is a wide range of things that 
could be different but if the company does not want to spend any money, 
it might be your best bet.  Use a subsystem with a private memory pool 
to sequester the memory.  You could also use dynamic LPAR to remove 
processor capability as well.  Start out at 0.1 processor and move up 
until your at the point where the system will run.

IBM does maintain a center for just this type of testing.  (there used 
to be one in Rochester I don't know if it is still there or not) It will 
not be inexpensive to do a test there.

Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


On 10/4/2012 10:38 PM, James LeLeux wrote:
> Hello,
>
> I need to perform some kind of stress test on our new Power System before
> going live. This is an audit requirement, yet somewhat vague.
>
> I did some searching (ML&  Google) and it was typically web related.
>
> I'm dealing with an traditional DB2/RPG app (MAPICS) with green-screen
> &  GUI client, looking to simulate heavy I/O, perhaps high user count.
>
> I'm open to do-it-yourself and very low-cost (open source) solutions, and
> appreciate any guidance you can offer.
>
>
> Thanks in advance...james
> --