Chapter 5. The ITSO EWLM scenario 139
Table 5-16 Definition of workloads
5.4.4 Setting service class goals
The final steps of the design phase are to set the performance goals and business
importance of each service class. The performance goal and business importance describe
how important each service class is to our business. The service policy is a set of these
definitions as described at 4.3.1, “Service policies” on page 102.
These values play a factor only when a service class is not achieving its goal. Resources may
be taken away from a less important service class in order for a more important service class
to achieve its goal.
You can specify a performance goal as follows:
? Percentile Response - Specifies a time in which a percentile of work requests should
complete.
? Average Response - Specifies an average amount of time in which work requests should
complete.
? Velocity Goal - Specifies how fast work should run relative to other work when ready,
without being delayed for EWLM managed resources.
? Discretionary Goal - Receives what’s left of the EWLM managed resources after all the
other goals have been met. This goal type does not have any importance nor goal
definition.
For
importance you can choose between the following values. Be aware that the importance
value is a business question reflecting how important it is to your business that the goal is
achieved:
? Highest
? High
? Medium
? Low
? Lowest
Service class name Workload name Workload description
SC_Trade3_shopping WL_shopping Shopping workload for Trade3 and Plants.
SC_Plants_shopping
SC_Trade3_default WL_default Default workload for Trade3 and Plants.
SC_Plants_default
SC_Trade3_account WL_Trade3_others General workload for Trade3.
SC_Trade3_profile
SC_Trade3_portfolio
SC_Trade3_quotes
SC_Plants_login WL_Plants_others General workload for Plants.
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