The dynamic operations environment, consisting of the autonomic,
or on demand, features of WebSphere® Virtual
Enterprise supports
three modes of operation: manual, supervised, and automatic. This
environment is supported by autonomic managers that perform tasks
such as application placement, workload management, health management,
and request flow management.
Defining the mode of the operating environment involves configuring
the WebSphere Virtual
Enterprise components.
You might find that you want a mixed environment, with some components
running automatically, or autonomically, while others are not. Flexibility
is built into the product to support logical systems, rather than
a switch to turn things on or off. In addition, the product supports
a supervised operating mode, where the system administrator accepts
or denies the recommendations of the autonomic managers.
The following are the features of the dynamic operations, as well
as the operating modes they support:
Autonomic manager |
Description |
Application placement controller |
Characteristics:
- Supports two modes: enabled or disabled.
If enabled, the application
placement controller supports automatic, supervised, and manual mode
for each dynamic cluster with which it is affiliated. The mode is
set on the dynamic cluster.
- Applicable to a dynamic cluster.
- Not autonomous functionality, as this is dependent upon the dynamic
cluster setting.
- Is a distributed resource managed by the high availability manager.
The
application placement controller exists within all node agent and
deployment manager processes. The controller is active in one of these
processes. If the active process fails, the controller becomes active
on another node agent or deployment manager process.
|
Autonomic request flow manager (ARFM) |
Characteristics:
- Supports two modes: manual or automatic.
- Autonomous functionality, as this can be enabled individually.
- If you are not in ARFM manual mode, you can
set the arfmManualAllocation custom property to disable the autonomic
setting of the ARFM control knobs.
|
Dynamic WLM (DWLM) |
Characteristics:
- Supports two modes: enabled or disabled.
- Applicable to static clusters and dynamic clusters. DWLM is enabled
on dynamic clusters by default, and disabled on static clusters by
default. To enable DWLM on a static cluster,
click Servers > Clusters > cluster_name >
Dynamic workload management (DWLM). To disable DWLM on
a dynamic cluster, click Servers > Dynamic clusters > dynamic_cluster_name >
Dynamic workload management (DWLM).
- Autonomous functionality, as this can be enabled individually.
|
Health controller |
Characteristics:
|