hi bruno! thanks for the post, this is a great question. the short answer is that the datastore simply doesn't support data warehouse or data mining well. it's doable, but far from ideal, for the reasons you've mentioned. it's aimed at serving webapps, which it's good at, but not at ad hoc reports or queries.
for use cases like counters, if they're needed for end user requests, we usually recommend updating them on writes, as you mentioned, but you're right that that doesn't work for the arbitrary number of reports or queries that data warehouses traditionally support, nor does it work for the ad hoc queries often needed for data mining and business intelligence. right now, if you need an industrial strength data warehouse, i'd recommend bulk downloading your data and using a third party solution. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
