I've read/browsed through your datastore comparison pdf, and these are
my two takeaways:
1. MySQL scales the best and provides comparable performance to
"native" GAE (up to 48 nodes); other back-ends (Cassandra, Voldermort,
etc.) are slow under heavy load;
2. you don't have indexes yet and thus if our app uses (hundreds of)
millions of entities and is query-heavy, AppScale is not suitable for
Did I get it correctly?