End-To-End Performance Study of Cloud Services

Interesting! Matched my experience with the slowness of SimpleDB.

That said, this benchmark web application does not hit the sweet spots of SimpleDB and AppEngine: parallel queries.

For AppEngine, using a single entity group (for transactions, data needs to be server-localized, and that is one thing that an entity group does) is really not using the platform correctly.

That said, good article!