On Sun, Aug 19, 2012 at 4:47 AM, alex <a...@cloudware.it> wrote: > >> Nothing in the datastore can change faster than once per second; > > is true only in case of a single entity group. So, you're better off reading > official docs.
Perhaps I wasn't clear enough - that's my entire point. No _single thing_ in the datastore can change faster than once per second. In the case of rapidly mutating data, this is a problem. Aggregations in particular, because if you aggregate 100 things mutating once per second, the aggregation has to mutate 100 times per second. Thus: "Apps with a lot of rapidly mutating aggregation are hard." This is not to say that you should not read the official docs. You definitely should. But some walls are not obvious until you slam your head into them a few times. Jeff -- 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.
