I solved this problem by spinning off a task queue with an ETA of 1-5 minutes that would flush the total count into a different entity. The tradeoff is that count totals are delayed and it's not even close to real time, but the advantage is that it gets the best of both worlds:
This code lab is slightly out of date (also may not work ... ), but there's some sample code using a deferred handler to do what I just explained. Check it out: http://io-bootcamp-datastore.appspot.com/ -- Ikai Lan Developer Programs Engineer, Google App Engine plus.ikailan.com | twitter.com/ikai On Thu, Oct 6, 2011 at 7:44 AM, Liang Ding <dl88...@gmail.com> wrote: > stores the sum count as a property of a product entity, updates it with a > cron job maybe a teade off solution.... > > > On Thursday, October 6, 2011, dnkoutso <dnkou...@gmail.com> wrote: > > We have 5 shard counters per product. > > Both are important....I would say retrieving perhaps more important. > > Each shard counter is in a transaction when it is about to be > incremented. I use this for representing most viewed products ---> most > popular products. > > Thanks! > > > > -- > > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > > To view this discussion on the web visit > https://groups.google.com/d/msg/google-appengine-java/-/bzXVD2r_84kJ. > > To post to this group, send email to > google-appengine-java@googlegroups.com. > > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com. > > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > > > -- > My Blog: http://88250.b3log.org > -------------------------------------------------------- > Open Source, Open Mind, Open Sight, Open Future! > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > google-appengine-java@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
