Resource Allocation and Adaptation: The heart of
the Policy Service is the Resource Allocation and Adaptation Mechanism (RAAM). As seen by the large arrows
in Figure 3, the RAAM is part of a system-wide adaptive loop. It enables software components within Cells
to achieve their performance goals while optimizing resource distribution across the system according to global
policies. RAAM allows each Cell to register one or more
resource-allocation policies, thereby injecting application requirements and user preferences into the decisionmaking process.
3
RAAM updates the STRG to reflect
changes in resource allocation.