Re: Understanding iSeries Performance Positioning

["Nathan M. Andelin" <nandelin@xxxxxxxxxxxxxxxxxxx>]

Thanks Alexei,

There's really a lot of information available about the TPC-C benchmarks.
It's clearly a database intensive benchmark.

If CPW is similar to TPC-C, then it won't give you much of a feel for the
performance of Websphere based applications - which are CPU intensive.  For
CPU intensive workloads, it would be helpful for IBM to supply a CPU rating
in addition to a CPW rating.  For example, aside from running their own
benchmark, no one would have any idea that the CPU speed of a 270-2250 was
17 times greater than a 170-2290.  I think that most people... well, me
anyway, would assume that CPU speed and CPW rating were more closely
related.

BTW,  what is the smallest recommended configuration for running Websphere,
Java, and EJBs?

Thanks,

Nathan.


> CPW benchmark is very close to TPC-C.
> The major difference is that TPC-C requires independent auditing, and is a
> very expensive undertaking.
>
> I've had a chance before to mention that fast CPU does not guarantee good
> commercial results - if I/O is a bottleneck, CPU will be mostly ilde.
>
>     Alexei Pytel