Chapter 1. IBM Enterprise Workload Manager Overview 9
Figure 1-5 EWLM managed server policy and data
Figure 1-5 provides a detailed view of how the instrumented application, operating system
and extensions, and managed server interact to assimilate, correlate, and aggregate data
using the policy, transaction data, resource data, and process data. It is at the managed
server where the data is captured and classified in the context of a Domain Policy.
The IBM Virtualization Engine concept of System Services, System Technologies, and
Operating Systems all working together is clearly demonstrated in this component
1.2.3 Control Center
The EWLM Control Center, from this point forward called the Control Center, is the EWLM
Web-enabled user interface that supports three categories of tasks:
򐂰 Administration of EWLM policies
򐂰 Operational actions against the EWLM management domain
򐂰 Display of performance statistics
The Control Center only communicates with the domain manager, it has no direct interaction
with the managed servers in the domain. It requires an administrator or operator to log in and
uses role-based authentication. User IDs must be created at the operating system level first
and then the userid can be added to the Control Center using configuration commands that
identify the role of Administrator, Monitor, or Operator as described later in “Setup function of
the Control Center” on page 82.
O/S EWLM Native Services
Process/Thread Data
EWLM Managed server
Tx Data
Resource Data
10 IBM Enterprise Workload Manager
The Control Center runs on the WebSphere Application Server instance that is installed with
the EWLM domain manager. It runs as a separate process from the domain manager, but it
must run on the same server as the domain manager and its scope is limited to the one
Management Domain. The flow of data between the browser and the Control Server can be
SSL encrypted. SSL encryption is the highly recommended way of operating. Refer to
“Browser to Control Center” on page 172 for further details.
Administration activities carried out through the Control Center entail creation and
maintenance of EWLM domain policies which include service classes, transaction classes,
and process classes. Performance goals can be set at the service policy level for each
service class.
The Control Center supports two modes of operation; one is
offline, where you develop and
edit a domain policy for future deployment; the other is editing a copy of a
live domain policy
that has already been deployed to all managed servers in the domain. Editing a copy of a live
domain policy allows you to make adjustments to the existing policy and deploy to all
managed servers as needed.
Operational activities include controlling and monitoring the current operational state of the
management domain. The operator can manage the service policy that is in effect for the
domain. This includes:
򐂰 Displaying all service policies available for the current deployed domain policy
򐂰 Querying the properties of the service policies for this domain policy
򐂰 Activating any of the service policies for the current deployed domain policy
The operator also has general operational capabilities, which include:
򐂰 Displaying each server or operating instance in the management domain
򐂰 Displaying the overall state of each server or operating instance
򐂰 Initiating actions to disable and enable an individual managed server if problems occur
The most important capability the Control Center provides is monitoring and reporting. Data
is provided in real time and can be shown in 1 minute to 60 minute intervals for the active
service policy. Views range from high-level business driven reporting to response time and
resource data.
High-level reporting is centered around the service classes and how well the management
domain is doing in achieving its business goals. The service class view identifies the goal
versus actual and a calculated performance index. Analysts with the Monitor role can drill
down from here into the underlying statistics to help determine where, why, and how these
Note: The Control Center can be launched from the Virtualization Engine (VE) Console.
As the Virtualization Engine Suite for Servers becomes more tightly integrated over time,
the Control Center will become part of the VE Console dashboard.
Note: Administrators have access to monitoring, operational, and administrative activities.
Operators have access to monitoring and operational activities. Monitors only have view
capability to monitoring activities.
Note: Data is provided real time every 10 seconds from all the managed servers in the
domain to the domain manager. The domain manager continuously merges received data
into the “live” view of the management domain.

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