Environmental Engineering Reference
In-Depth Information
Autonomic Element
(including Autonomic Manager)
Managed Component
Self-Adjuster
Self-Monitor
Self-Aware
Knowledge
Adapter/planner
Environment-
Aware
Reflex
Signal
Environment-
Monitor
HBM/PBM
Autonomic Communications Channel
Fig. 8.2.
Autonomic element (AE) consisting of autonomic manager (AM) and
managed component (MC)
correlations, rules, beliefs, expectations, histories, and other information
known to the autonomic element, or available to it through the knowledge
repository within the AM.
AE
AE
:
The Autonomic Environment requires that autonomic elements,
and in particular, AMs, communicate with one another concerning
self-
↔
activities to ensure the robustness of the environment. Figure
8.2
views an AE with the additional concept of a pulse monitor (PBM). This
is an extension of the embedded systems heart-beat monitor (HBM),
which safeguards vital processes through a regular emitting of an “I am
alive” signal to another process, with the capability to encode health
and urgency signals as a pulse [
148
]. Together with the standard event
messages on the autonomic communications channel, this provides not
only dynamics within autonomic responses, but also multiple loops of
control, such as reflex reactions, among the AMs [
159
].
∗
8.1.4 Evolution vs. Revolution
In recognition of, first, the need for differing levels of human involvement, and
second, the reality that the overarching vision of autonomic computing will not
be achieved overnight, autonomic computing maturity and sophistication have
