This is really similar to the thread entitled "GAE - Vote counting system" - have a look and see if it fits with your use case.
http://groups.google.com/group/google-appengine-java/browse_thread/thread/4812840ad76c73b On Oct 5, 6:53 pm, dnkoutso <[email protected]> wrote: > I have an Android client that deals with product items and I would like to > create an interface for displaying the most popular programs at any given > time. > > I have read and used shard counters to achieve highly scalable and parallel > counting. This has been working well as far as counting is concerned. > > However, the problem starts when it comes the time to calculate the top 10 > most popular product items for a single request, I have to fetch them all > product entities first, fetch the shard counters of each and add them up and > then finally sort them to get the most popular ones. > > The problem here is that in order to find out whats the most popular I have > to recalculate all shard counters. Multiply that by 10000 product items and > my request for a single user becomes slow as hell. > > I need to very quickly calculate the top 10 product items in a LIVE manner. > Is this even conceivably possible? > > I've thought the idea of using a cron job to calculate the result and store > that instead. Would you recommend me going that way? Has anyone else dealt > with a similar situation? > > Thanks! -- 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
