Re: Understanding iSeries Performance Positioning

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

Thanks, Chuck.  I'll look at their web site.

In stress testing some of my Web applications, it seems that CPU speed is
the first bottleneck on my system.  My box will move data relatively
quickly.  I can copy large files from one library to the next.  I can
transfer large stream files from the IFS to my PC on the network.  The
performance is pretty good.  But if I add CPU bound logic to parse or format
the data, like in a Web application, the throughput drops dramatically.  My
box is a 170-2290.

I assume that on a 270-2250, disk I/O would be the bottleneck, rather than
the CPU.  Our benchmark revealed that the CPU is 17 times faster.  But the
CPW rating is only 5 times greater.  It seems that more detailed performance
information would be helpful in gearing an iSeries purchase to its intended
use.

Nathan.


> I believe the Commercial Processing Workload
> rating is based on the TPC-C rating, created by the
> Transaction Processing Performance Council.  You
> can get more info on them at their website,
> http://www.tpc.org/.

> Chuck