Stephan, No, there is no way to stick sessions to application instances. While you can't associate all the data in a single Memcache key, you can break up the data, using a Memcache value as an index for the rest of the data.
On Wed, Dec 2, 2009 at 2:48 PM, stephan <[email protected]> wrote: > I have a GAE application that has some complex reporting requirements. > Since there is currently no support for aggregate queries, my approach > is to instead build up a collection of the items to query in memory, > and then use JOSQL to perform the queries I need. > > For the most part this has worked out OK. Part of the complication, > however, is that if I have a lot of items I need to collect from the > datastore (tens or hundred of thousands of items), I need to do this > in "chunks", in order to stay under the 30 second request limit. I do > this by issuing successive AJAX requests to initialize my data. > > The problem is that occasionally the app will hit some threshold that > causes the GAE infrastructure to spin up a new JVM. In this case, all > the items I've collected in memory in the first JVM will no longer be > there, and I have to start over. For situations where it may take 10+ > minutes to build up the collection of items, this becomes problematic. > > I'm wondering if there could be some way (via some special http header > or otherwise) to ensure that all requests from a given user/session > will stay "stuck" to the same JVM. > > Any other possible solutions I could consider? (Memcache, BTW, is not > an option, as the amount of data I'm building up in memory is more > than the 1MB maximum for memcache entries.) > > thanks, > > ...stephan > > -- > > 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]<google-appengine-java%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > > -- Ikai Lan Developer Programs Engineer, Google App Engine -- 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.
