Hi Guys We have a small application running on JBoss, Seam, Hibernate and PostgreSQL that we are thinking about moving to GAE/J. To test the datastore we uploaded our data 1-1 so all our tables from Postgres were represented as entity types in the datastore with the entities relating to eachother through their keys. As a proof of concept of the performance of the datastore, we did an implemented one of our heaviest reports by joining 6 entities together. And the performance proved to be really bad. Infact we received the deadline exception before we got to join all the entities. From the platform we are running on now, this could be done in less than a second. This doesn't tell me that Google datastore is worthless. It tells me, that I'm doing something wrong, and that I need to think differently about the data structures to make it perform on GAE. I've been looking around and I can't seem to find really good sources on datastore/JDO best practises. Does anybody have any good resources on this toppic? I would really apriciate your help.
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