Workload and Performance 29
Workload and Performance
To help size the minimum number of disk arms required for a given AS/400 processor, refer to
the AS/400 Disk Arm Requirements based on the Processor Model Performance document at
http://www.as400.ibm.com/developer/performance
ISV and other application solution providers also have recommendations for a minimum
configuration.
AS/400e servers 270 and 8xx Performance
The new AS/400e server 270 with four processor options extends well beyond the Model 170.
Entry performance is three times the Model 170. Top model performance is nearly doubled.
The introduction of the 8xx servers is a significant step in the evolution of the AS/400e server
product line. Top model performance is increased three and a half times for base and
interactive performance.
AS/400e servers 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: The term
Processor Feature
is used to indicate the feature code by which the
processor is ordered. The term
Interactive Feature
is the feature code by which interactive
performance is ordered. The term
Processor Feature Code
is used by OS/400.
System
Processor Feature
is used by SLIC to indicate the same function.
The AS/400e servers 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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