This illustration of Oracle engineered systems shows a flow from left to right, from Stream to Acquire to Analyze to Visualize:

Stream: Lists social media, blogs, smart phones, meters, sensors, web logs, trading systems, and GPS signals.

Acquire and Organize: Shows Oracle Big Data Appliance

Analyze and Visualize: Shows Oracle Exadata and Oracle Exalytics

InfiniBand connects Oracle Big Data Appliance to Oracle Exadata Database Machine to Oracle Exalytics In-Memory Machine.