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ance of an SOA solution; the next topic for this chapter will teach us how to boost per-
formance using the Service Grid pattern and its Oracle realization: Coherence. Some other
HA patterns will be discussed as well.
In the final part of the chapter, we will talk about the relations between SOA composition
patterns and cloud implementation patterns, mainly focusing on aspects related to convert-
ing the Service Composition Broker into the Cloud Broker. The Cloud Broker's responsib-
ilities such as cloud Resource Balancing with an Elastic Resource Capacity management,
cloud services' consolidation and aggregation, and Burst In and Burst Out, are derived
from the agnostic controller's features; we have to highlight them in order to avoid the pit-
falls that SOA met in its early days. There is no magic in the cloud; it is a form of distrib-
uted computing with principles based on SOA (among others). We'll discuss this, but our
introduction will be short as it is not the subject of this topic.
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