The White House hosted an online town hall meeting on GAE with GWT, and received 700 hits per second at its peak. http://google-code-updates.blogspot.com/2009/04/google-developer-products-help.html
But more than 1000 queries a second is never been tested. I think Java is not a good choice in your case. When your user suddenly increasing, starting a new Jave instance may cost more than 5 seconds, while Python needs less than 1 second. 2009/11/27 Eric <shel...@gmail.com>: > > Hi, > > I wish to set up a CPU-intensive time-important query service for > users on the internet. > Is GAE with Java the right choice? (as compared to other clouds, or > non-cloud architecture) > Specifically, in terms of: > 1) pricing > 2) latency resulting from slow CPU, JIT compiles, etc.. > 3) latency resulting from communication of processes inside the cloud > (e.g. a queuing process and a calculation process) > 4) latency of communication between cloud and end user > > A usage scenario I am expecting is: > - a typical user sends a query (XML of size around 1K) once every 30 > seconds on average, > - Each query requires a numerical computation of average time 0.2 sec > and max time 1 sec (on a 1 GHz Pentium). The computation requires no > data other than the query itself. > - The delay a user experiences between sending a query and receiving a > response should be on average no more than 2 seconds and in general no > more than 5 seconds. > - A background save to a DB of the response should occur (not time > critical) > - There can be up to 30000 simultaneous users - i.e., on average 1000 > queries a second, each requiring an average 0.2 sec calculation, so > that would necessitate around 200 CPUs. > > Is this feasible on GAE Java? > If so, where can I learn about the correct design methodology for such > a project on GAE? > > If this is the wrong forum to ask this, I'd appreciate redirection. > > Thanks, > > Eric > > -- > > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to google-appeng...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
