RE: cpw. unconstrained vs constrained.

["Andy Nolen-Parkhouse" <aparkhouse@xxxxxxxxx>]

Steve,

A constrained system is one in which the processor cannot perform to its
maximum potential under the CPW benchmark because of other hardware
constraints.  This usually means the maximum amount of memory which can
be configured on the system and/or the maximum number of disk arms.

You can figure the math; if your application will fit within 1,024 MB of
main storage and does not perform much disk I/O, then you may do better
than the constrained rating.  You cannot install more than 1,024 MB of
main storage or ten disk arms on the box.  IBM was trying to describe
the performance of a maximally configured system running a formal CPW
benchmark, while also indicating that the processor could have done
better if it had additional resources to work with.

Not a definitive answer, but I hope it's helpful.

Regards,
Andy Nolen-Parkhouse

> Subject: cpw. unconstrained vs constrained.
>
> first a quick ebay report ....
>
> ibm is more and more the best source for systems auctioned on ebay.
> currently about 5 systems on auction. by far the best price compared
to
> the
> saps who put up systems for over $10k and never get a bid.
>
> here is a good example:
>
> http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=2017727020
>
> it is a 170/2176.  constrained cpw 125/40.  unconstrained 319/40.
>
> What is the difference between constained and unconstrained cpw.
Will a
> batch job that is mostly cpu and memory bound, little io, run
> unconstrained
> ?
>
> Thanks,
>
> Steve Richter