Have a look at Memcached: http://code.google.com/appengine/docs/java/memcache/
<http://code.google.com/appengine/docs/java/memcache/>On the one hand, you won't have easy transactions, but you get a place to store data where it doesn't matter which application instance users are hitting. On Thu, Apr 15, 2010 at 9:10 AM, Phuong Nguyen <phuongn...@gmail.com> wrote: > Hi guys, > I'm creating an online game server with GAE and there's a few concerns > that I'd like to ask for advice. > > One of my problem is that I need to manage a lot of information that > would not make sense to be stored in database. Like the status of each > player, the last time server seen such player, his current position in > the game. I'd like to store all of these information in the memory and > periodically persist back to the data store. Problem is (correct me if > I'm wrong) that GAE may shutdown my app and restart it on different > server at any time, so, data in memory would be gone and I need to > reload them from the database. But, certainly, if GAE Server restart > my app before the periodical saving happens, then the status of > players may be gone without my ability to recover back from database. > And, these data are subject to high change, so, persist them to data > store frequently would not be sensible. > > So, I may encounter problems to keep these data in memory. And I may > also encounter performance problem to constantly persist these data to > data store. So, would you guys please give me some advice? Am I > missing some thing or there should be any technology/tricks that can > be employed on GAE that can facilitate me to build such online game > like this? > > Thanks. > Phuong > > -- > 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-j...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2bunsubscr...@googlegroups.com> > . > 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 http://googleappengine.blogspot.com | http://twitter.com/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 google-appengine-j...@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.
