Cloud Computing and SOA Convergence in Your Enterprise: A Step ...

Selecting Platforms 201
Services
Application-as-a-service
Platform-as-a-service
Infrastructure-as-a-service
Information-as-a-service
To make this point clearer, here are a few examples of physical instances
of architecture. We first selected categories of cloud computing providers,
and then we selected the providers (Example 11.1).
Example 11.1
Processes:
Process-as-a-service
Appian Anywhere
Data:
Infrastructure-as-a-service
Amazon EC2
Database-as-a-service
Amazon Simple DB
Services:
Infrastructure-as-a-service
Amazon EC2
For instance, we may store our data within Amazon Simple DB as well as on
the Amazon EC2 platforms. Then, we might build and/or host the services
on the Amazon EC2 platform, say, using an application server they provide
on-demand within that platform. Finally, we could leverage Appian Anywhere
as the platform where those processes live. Keep in mind that the processes are
connected to the services, and the services are connected to the data, as we described
in earlier chapters. We are just selecting the target platforms here.
This solution could become more complex by leveraging more cloud
computing providers (Example 11.2).
Example 11.2
Processes:
Process-as-a-service
Appian Anywhere
Application-as-a-service
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