[comp.unix.aix] RS/6000 Performance Comparison

rg@gandp (Dick Gill) (03/15/91)

I have a question regarding the relative performance of model
320 vs model 520.  Since they both use the same processor, I
have (naively?) assumed that similarly configured systems in
terms of RAM, hard disc, etc. would perform similarly.

Not so, according to second-hand stories I hear from the field,
where THEY say that 320 performance is weak while the 520 is a
strong performer.

Can anyone shed the light of real experience on this question?

Thanks.

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Dick Gill     Gill & Piette, Inc.             (703)761-1163  ..uunet!gandp!rg

  

scott@prism.gatech.EDU (Scott Holt) (03/15/91)

In article <346@gandp> rg@gandp.UUCP (Dick Gill) writes:
>
>Not so, according to second-hand stories I hear from the field,
>where THEY say that 320 performance is weak while the 520 is a
>strong performer.
>
>Can anyone shed the light of real experience on this question?

Well, I don't have a 520 to benchmark, so what I say here is just
speculation.

If the particular process you have is I/O bound, then the disks
in the two machines will make a difference. Its not the amount of
disk space that matters, but their relative speeds. If you have 
a slower disk in one that the other, then an I/O bound task will
have different performance characteristics. I don't know the 
exact details, but there are differences in the performance
characteristics of the disks you can get in the machines - between
some, the numbers differ significantly.

- Scott
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