I've made a benchmark and testing of the google app engine fetching system. The data I've recolected have been very useful to me:
The full benchmark is at http://analysis.buenoslinks.com ...As you see, the first try shows a low quote but executing the loop more and more times has the megacycle use increased by more than 250%! Nevertheless, the number of points fetched from the web was also severely increased Finally, I've tested the number of server errors throwed by google application among the complete process Seg. % Server Error 08s. 00% 09s. 56% 10s. 100% Final Words: Depending on the hour and network situation, the sandbox gives approximately 8 seconds (sometimes 9) to your process to resolve. If your application depends on fetched results, protecting your code with timer blocks should be a good idea to avoid server errors. If you don ´t do it you will have several of these black and white error screen These tests have also revealed the existence of a fetching proxy. Actually it worked quite well during my tests but google should give us more data about it in order to adapt or codes to it. The more fetching you do, the quicker they are but megacycles are also increased by 100% in my examples. I suspect that this increase is produced by the access of the engine to the fetching proxy cache. Another negative point is that coders have no control at all on the fetching process. I agree with the 5 seconds time out politic, it is quite reasonable but I should be able to diminish this time when I need it. In my project I should use this to make my code more flexible depending on the network condition. If only threads were allowed it should be another way with the quotas control system the google system integrity is secure As conclusion I think that google app engine is a good idea, but with a lot of work to do. First de documentation has to be much more precise, with much more technical data such as timeouts or high demands process quotas. Google api’s are to simples, they are not customizable at all. It is black or white, no grey. I’m very enthusiast about it but it is actually not ready for big projects. --~--~---------~--~----~------------~-------~--~----~ 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-appengine@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
