Re: Measure CPW used

Hello, all:

CPW is an artificial "benchmark" number published by IBM. It is whatever they say it is. IBM does not reveal or disclose the actual application programs they use to run these benchmarks, so that others could independently validate those results. Also, if you read the "fine print" you will see that IBM specifically states that CPW ratings were obtained on "a maximally configured" system -- this means a system with the absolute maximum amount of disk, cache, IOPs/IOAs, and main storage. Only the very largest IBM customers will ever come close to having such a configuration.

CPW might be good for getting a "rough idea" (or "ballpark" figure) of how much more powerful one model of System i is, versus another model. It is not intended to be an accurate predictor of what kind of performance you will obtain, because your particular configuration will be different, and your "applications mix" will be different, etc.

Here are some links:
http://www-03.ibm.com/systems/power/hardware/reports/system_perf.html
and
http://www-03.ibm.com/systems/power/hardware/notices/specnote.html#benchmarkvalues

Mark

> rob@xxxxxxxxx wrote:

Thank you.

So the only way to test CPW is to get the method from the IBM lab and run that on your system in a somewhat dedicated state?

Rob Berendt