how many shard counters for a single product entity you made? i think we should consider the time for writing and retrieving, which one is the most important for this app.
On Thursday, October 6, 2011, dnkoutso <dnkou...@gmail.com> 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 view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/FwefKXsl6_YJ. > 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.
