On Sat, Oct 4, 2008 at 4:06 PM, Josh Heitzman <[EMAIL PROTECTED]> wrote:
> * GAE can't not tell you how many total entities there are of a > specific type and it can't count more then 1000 entities. > * GAE limits the entities that can be processed in a single > transaction to those in the same entity group and only one request > processing instance can write to an entire entity group at a time. I fail to see how either of these could be implemented in a truly scalable and distributed system such as App Engine. The data is potentially spread over thousands of machines, so any kind of global co-ordination (needed for both entity counts and transactions) would require a single machine to be "in charge", and hence the scaling would be limited to that machine's capacity. If you care about counting the number of a particular kind or all kinds, simply increment a sharded counter each time you add an entity. That would scale very well, and give you quick access to totals. Dave. --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
