Workload and Performance 43
Workload and Performance
To help size the minimum number of disk arms required for a given AS/400e processor, refer
to the AS/400 Disk Arm Requirements based on the
Processor Model Performance
document
at:
http://www.iseries.ibm.com/developer/performance/dasdmenu.html
ISV and other application solution providers also have recommendations for a minimum
configuration.
iSeries Model 270 and 8xx Performance
The iSeries Model 270 and 8xx servers are significant steps in the evolution of the AS/400e
server product line. iSeries Models 270, 820, 830, and 840 are configured to meet a wide
range of performance requirements. Whether the system is running mostly back-office
applications, newer e-business applications, or a mixture of both, the performance can be
customized on the new servers to match business needs. Each model includes a base
processor and interactive performance feature. Optional processor and interactive
performance features can be selected to balance the server's performance for a given
workload. Increasing performance on installed servers is done simply and with little
disruption.
Note: Please note the following terms:
•
Processor Feature: Used to indicate the feature code by which the processor is
ordered.
•
Interactive Feature: The feature code by which interactive performance is ordered.
•
Processor Feature Code: Used by OS/400.
•
System Processor Feature: Used by SLIC to indicate the same function.
iSeries Models 270, 820, 830, and 840 offer two CPW ratings to allow customizing of
performance for a given workload:
•
Processor CPW: Represents maximum relative performance running commercial
processing workloads for a processor feature. Use this value to compare relative
performance between various processor features. Processor CPW is known as
Client/Server CPW in prior releases.
•
Interactive CPW: Represents the relative performance available to perform interactive
workloads. The amount of Interactive CPW consumed reduces the available Processor
CPW by the same amount. Interactive CPW for a specific processor is changed
through the installation of optional Interactive Features.
The interaction of the Processor CPW and Interactive CPW is illustrated in the following
figure.
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