There are two new awr reports in 11gr2, which will be helpful to dba’s in Real Application Clusters Environments (RAC).
This is a cluster wide awr report, so you can see a lot of the information from all the nodes in the same section, and you can also see aggregated statistics from all the instances at the same time (You can see totals, averages and standard deviations).
This is a cluster wide stats diff report (like you had awrddrpt.sql in 11gr1), comparing the stats differences between two different snapshot intervals, across all nodes in the cluster.
These are huge additions to the awr reports, that enable understanding the database performance in real application clusters environments.
The National Institute of Standards and technology has a good, concise definition of cloud computing. Sushil kumar of Oracle, was using the same language to define cloud computing in an article the current release of the oracle magazine.