wouldn't going from 23 arms to 10 create a bottleneck at disk IO?

Not necessarily... Today's systems come with much bigger and faster disk
cache...

Dual CPU's will also help query performance via Symmetrical
Multiprocessing.

The best thing I see here is the doubling of RAM ... IBM i loves RAM...

Kenneth
Kenneth E. Graap
http://www.linkedin.com/in/kennethgraap


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Mike Cunningham
Sent: Tuesday, September 01, 2009 9:26 AM
To: 'Midrange Systems Technical Discussion'
Subject: 520 Config

We are looking to upgrade our 520 and our business partner has proposed
this config
2 CPUS 8300 CPW
32GB RAM
10 - 139.5GB disk drives

We currently run 1 CPU, 16GB RAM and 23 drives of various sizes.

I know this is a hard question to answer without a whole lot more
information but, generally, wouldn't going from 23 arms to 10 create a
bottleneck at disk IO? If we have any bottleneck currently it is with
RAM (Websphere takes a lot) and an occasional spike in CPU. We wanted to
get dual CPUs because we do plan on doing some partitioning in the
future. I know this config was done using IBMs configuration tool, would
it build a system that was not going to perform well?
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