Impact of the CAP theorem
Wednesday, March 09, 2011
1:56 PM
In the cloud context: 
CAP theorem claim is related to my initial claim about the tension between consistency and concurrency.
Main contribution: cloud datastores can be categorized in terms of the two (of three) properties C,A,P that they exhibit. 
AppEngine JDO is in class CP = Consistency + Partitionability
Only other reasonable class is AP = Availability + Partionability
We don't want a cloud datastore that loses data! (e.g., ¬P)