Re: how is system geared down?

["Alexei Pytel" <pytel@xxxxxxxxxx>]

Absolutely not!
System performance is a function of so many factors - cache size, memory
bandwidth, I/O bus parameters and many many others. You can use the same
CPU chip and have systems with different performance as a result.
System is assembled from many different components and there could be many
business and other reasons to choose different sets for components for
different models.
It is not necessary to do any special measures to "gear down" system.
I do not understand why this simple concept meets so much objection ?

Simple example (often meet in practice, unfortunately)... Imagine 24-way
box with 512MB memory and 10 disk drives. Will you expect it to support
10000 users ? This system will never even come close to announced CPW. And
it has nothing to do with CPU speed. Will you say that this system was
"geared down" for some purpose?

    Alexei Pytel

"Pessimist is nothing but a well-informed optimist"




                                                                                
                   
                    "Leif Svalgaard"                                            
                   
                    <leif@leif.org>           To:     <MIDRANGE-L@midrange.com> 
                   
                    Sent by:                  cc:                               
                   
                    owner-midrange-l@mi       Subject:     Re: how is system 
geared down?          
                    drange.com                                                  
                   
                                                                                
                   
                                                                                
                   
                    05/09/2001 11:29 AM                                         
                   
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From: Alexei Pytel <pytel@us.ibm.com>
> I am kind of tired to repeat that system was not slowed down.
> CPW is based on a commercial mix which involves lots of database I/O.
> System can have faster CPU but smaller CPW simply because it has limited
> I/O bandwidth - less I/O slots, less disk drives.

Alexei, your answer flies in the face of all the other postings
claiming that it makes more business sense to only produce
ONE type of CPU (the fastest) and then slow it down to
accommodate a range of models.

Leif


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