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Good points Mike.
Thanks for the reminder about 2-tier vs 3-tier.
On i, we can scale up the DB and app server together,
within the same partition. When they are together it is
called a 2-tier solution. (The user GUI is the other tier.)
Our largest 2-tier PRD system I know of is a 40 way P6.
Windows will split the DB server and app server out to
separate boxes rather quickly - using 8 or less cores
max on any one box. This is 3-tier... DB / APP / GUI.
For SAP's data warehouse app, they often even split the
DB across separate boxes for performance.
So - for our 40way example, they'd use at least 5
different servers to do what one of ours does.
If there's HA - then it's >=10 of theirs vs 2 i's.
Ron Schmerbauch 507-253-4880
IBM Rochester Development Lab, SAP on Power i
http://www-03.ibm.com/systems/i/support/erp/
http://www.sdn.sap.com/irj/sdn/db4
http://www.twitter.com/SAPonIBMi
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