Iseries Model 270 And 8Xx Performance - IBM i series Handbook

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.
Workload and Performance
Workload and Performance
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