IBM Enterprise Workload Manager Release 1

Chapter 1. IBM Enterprise Workload Manager Overview 11

results were achieved. The following monitors are available for drill down in the EWLM

Control Center:

򐂰 Performance Index Monitor

򐂰 Goal Achievement Monitor

򐂰 Transaction Count Monitor

򐂰 Transaction Rate Monitor

򐂰 Processor Usage Monitor

In addition to monitor drill down, you can also drill down from the service class, transaction

class, or process class to get a server or application topology view. The application topology

view provides a diagram of applications that processed transactions for a particular class. The

server topology view provides a diagram of the managed servers that processed transactions

for the particular class. These views provide a transaction workflow in a heterogeneous

environment.

Detailed reporting provides performance data for domain policy components, for example,

workloads, service classes, transaction classes, process classes, or managed servers. The

following detailed reports are available in the EWLM Control Center:

򐂰 Managed server details

򐂰 Service class details

򐂰 Process class details

򐂰 Transaction class details

1.2.4 Domain policy

An EWLM Domain Policy provides a solid context to associate relevance of all other statistics

collected. It is a contract which prescribes how EWLM should treat work within a

management domain. This includes how the work can be classified, prioritized and

monitored. Management of work, meaning taking action based on performance statistics, in

this release is only available in conjunction with Cisco Systems Inc. load balancer.

A Domain Policy is a collection of service policies, applications, transaction classes, service

classes, and optionally platforms and process classes for an EWLM Management Domain.

As you can see in Figure 1-6, a Domain Policy can have an unlimited number of service

policies (in the sample you have Weekend and week day), but only one service policy can be

active at a given time in the domain. You can have multiple service policies which have

performance goals that are specific to a certain time of day or week and these policies can be

activated as needed. Only one Domain Policy is needed for a domain because it contains all

the service policies for the domain.

12 IBM Enterprise Workload Manager

Figure 1-6 EWLM Domain policy elements

Within the Service Policy, service classes are defined that specify the performance goals you

want to achieve for your transactions and your processes. The Service Policy also contains

transaction classes and process classes that are used to classify your workload and to

associate it to service classes and consequently to performance goals. You can customize

service class goals and categorize them in different service policies to achieve different

performance objectives. This would make sense when you have different performance

objectives for the weekend and week days.

Creating a Domain Policy for your domain requires that you have a certain degree of

understanding of the business work flow in your environment. Depending on how many

management domains are created for your business, it is possible that one administrator

could be responsible for the Domain Policy of the “Banking” domain and another

administrator be responsible for the “Human Resources” domain, each being administered

through a separate domain manager and Control Center. If all of your business workflow is

within one domain, then the administrator will need to have knowledge of all that business

that you want to monitor and manage. This will also require an understanding of all the

applications and server instances that participate in the business workflow.

Most organizations have service level agreements (SLAs) in place today that are used as a

contract between IT and the business to ensure a certain level of performance for the

business workflow in the environment. These SLAs will need to be looked at and analyzed in

order to convert them to the performance goal terms used in an EWLM Domain Policy. The

result can be used to build a Domain policy for the EWLM Management Domain. There are

four types of EWLM performance goals:

򐂰 Average response time

򐂰 Percentile response time

򐂰 Velocity

򐂰 Discretionary