Peter Recore wrote:
> Does the app engine team share any stories they can share about
> internal load tests they've done, and how many millions of
> simultaneous requests their app was serving?
Well, they have been touting case studies recently, including that of
BuddyPoke with its 30 million page views a day. It's not millions of
simultaneous requests, but it's more than what a lone PC can handle.
Testing the scalability of Google App Engine is hard to do. You need
a realistic test app and you need realistic requests. In particular
you need a test scenario that reflects the sort of datastore
contention you're likely to have. You won't get a lot of requests to
update the same user's preferences simulataneously, but could you get
a lot of requests to update the preferences of a bunch of different
users. Once you got that you can try one simulataneous request, and
then slowly increase the number until you hit a quota limit. If you
don't get a lot of datastore timeouts, and the average request time
doesn't explode, then you can have some confidence that your real app,
the one the test app represents, can scale to handle any number of
users
Ross Ridge
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