5486wrkperf.fm Draft Document for Review October 18, 2004
54 IBM Eserver i5 and iSeries System Handbook
IBM Eserver Workload Estimator
The IBM Eserver Workload Estimator is a Web-based estimation tool that
automates the manual calculations previously required from paper sizers. It
allows the user the option to enter data for multiple workloads, from which a
machine recommendation is made that best fits overall system needs.
Workloads supported by IBM Eserver Workload Estimator include:
Installed system
PM Eserver iSeries
Web serving
Java
WebSphere Commerce Suite
IBM WebFacing Tool
WebSphere Portal Server
WebSphere Commerce Payments
Traditional
Generic computing resources
Domino
Linux file serving
Linux web serving
Non-IBM workload
You can learn more about IBM Eserver Workload Estimator on the Web at:
http://www-1.ibm.com/servers/eserver/iseries/perfmgmt/
When you reach this site, select Sizing Tools.
Disk arm requirements
A physical disk drive (and the processing through the disk controller) performs a
specific number of disk accesses each second. The configuration of disk units
influences the overall performance of the system. Newer disk arms and
controllers provide better performance than previous drives. Therefore, fewer
disk drives (disk arms or actuators) can typically be used, yet provide
comparable performance.
You can provide for the best obtainable disk subsystem performance and enable
the best possible overall system performance. To do so, it is important to size an
iSeries server with an appropriate number of disk arms. The white paper iSeries
Disk Arm Requirements discusses this concept. You can find it on the Web at:
http://www.ibm.com/servers/eserver/iseries/perfmgmt/pdf/V5R2FiSArmct.pdf
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