Every GeneralCounterShard is an entity group. A transaction can only operate on ONE entity group. Your transaction code accesses every GeneralCounterShard for a given name. With sharded counters you NEVER have a perfect value for the total count. The value for get_count() <= Sum(shards) You use shards because you have object-lock possibilities.
Maybe this will work (using the function names from the article [1]) Be aware that at maintenance moments memcache is not working. def get_count_and_increment(name): count = get_count(name) increment(name) return count+1 [1] http://code.google.com/appengine/articles/sharding_counters.html --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---